The ROM is triggered for submersible pumps. What pump to choose? With built-in or remote ROM. Varieties of centrifugal aggregates

Puttered protective device borehole pump Used to implement the correct launch deep pump With a single-phase electric motor where the source of water is the artesian well. That the submersible pump is equipped with a single-phase electric motor, one can judge the end of the 4-core wire freely protruding from it.

What is a start-deficent device and its elements

The hand-held rod pump, which was previously used to raise water from the depth of the well, is currently widespread submersible. However, the electrification of the water supply process imposes its requirements and restrictions on the equipment used, the non-compliance with which inevitably leads to its failure.

Breaking pumping equipment - This is primarily the cost of its repair, and in the extreme case and for the purchase of a new one. In addition, the water supply is stopped on long term. The desire to avoid such troubles is due to the need to install an auxiliary equipment that ensures uninterrupted water supply. The start-defense effect in the process of operation of the device provides 2 of its composite element.

The application of the capacitor is achieved by a smooth start of the electric motor and its subsequent acceleration to the operating mode. And the presence in its composition of the protective thermal relay provides protection when an emergency situation occurs, and also turns off the power supply in the event of a malfunction of the electric motor.

The following causes of the triggering device are most common:

Excess operating voltage. It occurs due to voltage jumps in the mains above the maximum permissible level.
Top overload. The reason is in an increased load on the borehole pump, as well as if it is malfunction.

The main elements of the start-deficent device are:

launcher or condenser unit;
protective thermal relay with automatic or manual reboot;
connecting terminal block designed to convenience and ensure proper quality of the device connection.

Starting protective device of the well pump can be included in its kit, and supplied separately, however, in both cases independent connection Avoid protective equipment will not work.

Connection diagram in which the capacitor is made separately, most often used when using submersible pumps. This method is due to the larger labor costs while troubleshooting the built-in ROM. Separate mounting principle allows not to extract the electric pump from the well, and as a result, the breakdown is eliminated much faster and easier.

Criteria for selecting a start-defense device

When choosing a start-deficent device of a well pump, it is necessary to pay attention primarily to the power of the pump, as well as the capacitor capacity corresponding to this power. They are in direct addiction to each other. The ROM itself is universal equipment, and the correctly selected device provides the correct and uninterrupted operation of any deep pump.

Connection method

Connection of the ROM does not constitute any difficulties, and the presence of elementary knowledge in the electrical engineering allows you to independently perform all necessary work. Almost every product comes with a mounting scheme that can be found on the inside of the Case cover of the ROM.

However, in order to prevent electrical shouting cases for connecting, it is recommended to attract a qualified specialist. Especially it is not recommended to install and use the self-made device.

Dear casting!
My borehole pump is connected via a commissioning device. And the pump (some kind of Chinese, with a capacity of 1.5 kW) and the ROM was installed 10 years ago. Today I conducted annual prevention: adjusted the pressure / off pressure and touched the hectare. Then launched the pump to watering. After 10 minutes, the ROM worked. I have such a ROM (see the file in the attachment). On the right there is a red light bulb and a fuse button. So the red light burned, and I managed to return the ROM to life by clicking on the fuse button.
Again turned on the pump and began to gain water. More than the ROM did not work, although I scored 750 water somewhere in the tank, but the red light burned all the time before disconnecting the pressure relay.
Tell me, please, what is the reason for the reasing ROM?
There is such a condenser in the ROM (see File in Attachment). Maybe he lost his characteristics for 10 years and should be replaced?
Appreciate in advance.
There may be a response and late, but if you have a 1.5 kW pump, then its operating current is about 6.8 A, given that the thermal relay is selected from the condition 1.2 of the operating current, then it must be 8.2 A. According to the data on the cover of the control unit, there is a thermaller at 8 a, that is, it is at the very border of the working range, completely without stock. And the passenger operation of the pump with overload arising from the subflinking of the impeller or the screw, shutting the hose to watering with pressure lifting, etc., could cause protection.
And did the prevention spent? If so, what has revealed, and how does the pump work at the present time?
Why asked a question, I myself began to collect the control unit itself. The pump was turned on for 20 seconds, then turned off, and since the pressure had time to rise above the power pressure, the pump was not turned on until the pressure had fallen again. By locking the pressure relay, it was possible to find out that the first turning on the pump lasts 20 seconds, then the ROM turns off by 8-10 seconds until the thermal cooles, and then the second and all subsequent inclusions operate in a cycle of 8-10 seconds, 8-10 seconds resting , raising the pressure on 0.05 bar. So the thermorel should not work, when it is triggered, it should be disconnected, and it can be turned on by pressing the button. And to pump the hydroaccumulator with 2 bar to 3.5 bar need to wait in this clock mode for 10-15 minutes. Toot the thermaller, it is no higher than 30-35 degrees. The machine on the shield is 10 and does not work. Terorearele also on 8 A.
He conducted an experiment, crushed the thermaller, after that the pump began to pump water from 2 to 3.5 bar in 2.5-3 minutes.
This weekend took current mites to check the current consumption current. When starting seconds of 10-20 consumption current 5.2 A, then it starts to fall to 4.8 A, and at the end of the cycle, when the pressure rises to 3.5 bar, the consumption current drops to 4.5 A. Pump at 0.75 kW, for it the rated consumption current should be about 3.4 A, well, taking into account the losses Cosfi \u003d 0.8, then about 4.3 A. Pump is also a Chinese, there may be anything. Therefore, I think that with the pump so far everything is in order, just broke the thermal, and it is very strange, it works at a current of 5 A, and the contact breaks, and then automatically turns on, but already at least. I will change it.

Often will have to owner country houses And cottages, the hosts sooner or later face such a problem as ensuring the water supply of their homes.

You can constantly bring water and store it in large tanks only at the construction stage, and later the problem of providing water is solved in other ways. One of them is the arrangement on the site of a separate well.

In it, a pump is installed for uninterrupted water supply. Such a pump can supply water not only the house, but also a vegetable garden.

The diagram of such a pump and its characteristics are considered in detail. In general, the centrifugal pump consists of
- Rotor and Stator
- impeller and shaft
- guide apparatus and housing
- injected and suction pipes.

A bit of theory

To increase productivity, the structural diagram of the pump may vary.

Constructive diagram of parallel junction of pump wheels

With a parallel connection, each vane wheel supplies only a part of the overall feed, creating a complete pressure, the flow in the pump is divided into a number of parallel jets. Such pumps are called multithreaded.

When entering the pump, the stream is divided into two parts and enters the blade wheel on both sides. The blade wheel in this case is an union in one part of two paddle wheels located symmetrically relative to the plane, normal to the pump axis. When leaving the blade wheel, both parts of the flow are reappeared and entered into a spiral removal.

The design of such a pump is obtained very compact.

Constructive diagram of the serial connection of the pump wheels

With a sequential connection, each vane wheel creates only a portion of the full pressure at full feed, the pressure in the pump increases steps.

This type of construction allows you to increase the pump pressure at as many times as he has steps. All wheels are attached to the overall shaft and form a single rotor of the pump.

The axial pressure balancing system, bearings, the glands are combined in one common for all stages of the housing, which gives the pump compactness, reduces the weight and reduces the cost.

The diagram of the submersible pump is needed to see in what order is the connection of all parts.

First of all, it is necessary to determine the depth of the well. The depth of the well is determined by the depth of the occurrence groundwater. It must be remembered that the distance from the bottom of the well to the pump should be at least 1 meter. The distance from the upper point of groundwater to the surface of the Earth is called a dynamic level.

To ensure the uninterrupted all-season use of the well, a special well is equipped - Kesson. The depth of the caisson must be no less depth of soil freezing.

1. The pipe leaving the well in the caisson is cut and connects to the pipe deployed in the trench going to the house. Thus, the pipeline located in the trench going to the house must be at a depth of no less depth of soil freezing - i.e. At the level of the lower boundary of the caisson. It is recommended to put two pipes in this trench: the first work is a water supply, the second is the wiring.

Directly in front of the pressure control unit and the hydroaccumulator, you must install the filter rough Cleaning. Additionally, the same filter is installed at the output of the hydroaccumulator before the water supply to the pipeline system of the house, but this requirement is a recommendatory.

Electrical Pump Connection Scheme

The connection of the pump directly to the power supply threatens the rapid breakdown of the centrifugal unit and the main reason is that the pump will continue to work in idle even when the water level falls. For household water supply systems the correct option It is the inclusion in the water supply scheme of the factory units of automation. Such blocks are called pump control stations or hydrocontrollers.

The main functions of the hydrocontroller:
Smooth start and smooth stop of the pump;
Automatic maintenance pressure;
Protection of the pump from voltage jumps;
Protection against the lack of water level in the well;
Protection against overload on the network.

Such a unit of automatic control of the well pump is very the desired device And therefore, solid firms include it in the package of the pump, often with limited functionality.

AND electrical circuit Pump connections in this case looks as follows.
1 - control unit
2 - Pump cable with fork
3 - Cable with outlet
4 - circuit breaker
5 - socket with grounding
6 - Pump
7 - Pump Cable
8 - nipple
9 - check valve
10 - Pipeline Pipeline
11 - Cross
12 - Transitional nipple
13 -metallocav
14 - hydroaccumulator
15 - pipeline

However, for more long work The automation unit into a well-connected pump circuit must add the contactor, which will ensure the simultaneous power on the automation unit with the submersible pump.

Contactor - This is a highly reliable product designed to control electrical loads requiring large number On / shutdowns.

Pump Relay Connection Scheme

In some cases, in order to save the final cost of the pump set, the connection is performed without a control unit. Only pressure relays is used.

Pressure relay ensures the pump shutdown from electrical network When the upper limit of water pressure is reached in the hydroaccumulator and turning on the pump when the water is reached below the lower limit.

Simultaneously with the connection of the pressure switch to the pump, the automation unit is added to the diagram, which protects the pump from work to a dry stroke (no water level in the well).

The electrical circuit of the pressure relay and the automation of the pump in this case is as follows.

The pump connection scheme should only be made by a special water-wide cable that provides reliable grounding. Standard moisture-proof cable in this case will not fit. The length of the wiring is equal to the sum of the dynamic level of the pump plus the distance from the well to the boiler room.

The cable is attached (soldered) directly to the pump, isolation is carried out by a shrink hydrumuft. The heat shrink process itself is quite complicated, especially when performing for the first time, therefore this procedure is recommended to leave professionals, since the excess of the heat shrinking time threatens the loss of elasticity and water resistance, and the insufficient heat shrinking is characterized by incomplete waterproofing of the cable.

Connecting ROM (PUB-PROTECTOR) for submersible pumps

The start-proof device is intended for the initial pump launch and for the subsequent acceleration of its engine. Start is the most unfavorable mode for electric motors and to warn negative consequencesArguing when starting is set by the pump ROM.

The ROM serves to protect the current electric motor, exercising its automatic shutdown when overloaded. This is carried out using a thermal relay placed in the pump housing.

In addition, the device (together with the relay) includes:
- condensate block
- Terminals

All these elements are combined into a total electrical circuit.

Pump Connection Scheme to Hydroaccumulator

The hydroaccumulator is one of the most important components of the water supply system at home. The hydroaccumulator is used to accumulate water, maintain pressure in the plumbing system and, if necessary, add water to the pipeline (for example, when pressure drops).

The hydroaccumulator is a metal container inside which the rubber membrane is placed.

The diagram of the deep pump when it is connected to the hydroaccumulator should include pressure relays and pressure gauge. For ease of maintenance and pressure control, the hydroaccumulator is located in the boiler house. Factory pressure switch settings: Lower - 1.5 bar, upper - 2.8 bar.

Before connecting the pump to the hydroaccumulator, you must make sure there are pressure in the tank. Pressure in the tank should not exceed the pressure exhibited on the relay. The recommended value of the tank pressure of the hydroaccumulator must be 0.2 - 1 bar less pressure exhibited on the relay.

4. Preparation for the pump descent in the well. The diagram of the submersible pump to ensure water supply to the house should contain: barrel + check valve + fitting. All threads are compacted by the FUM ribbon, with the exception of the transition of metal plastic. Here applies an adhesive paste plus linen palable.

Before the pump in the well, immediately after trimming the pipes overlooking the well on it bottom part Opporter and rubber ring-seal. Each connection must be carefully sealed to protect the system from leaks.

The lowering of the pump in the well is carried out using a stainless steel cable with a diameter of 4-5 mm. The cable picks up two - three meters with a margin, for the possibility of fixing it at the ends: on the one hand, this is the upper part of the pump (stretched through special holes), special clamps (or rivet) are attached to the other side. Clamps are carefully covered with a tape.

The pipe at which the pump will serve water into the house must be straightened on smooth surface. The power cable is unlocked next to the cable. The pump is prepared for descent.

5. Switching pump in the well. The diagram of the submersible pump in the well is as follows. Via construction tie, every 1.5 - 2 meters it is necessary to fix the cable in the pipe.

After the descent on the casing, a borehole headpoint is worn. It is possible a water hose, a cable and a cable to do in advance through the hole of the head, before descent. The headpoint will protect the well from garbage.

6. Confix the capacitor and check the pump operation. If the water rolls out, then you can cut the pipe near the head and connect it with the pipe laid in the trench for water supply to the boiler room. The connection is made through a clutch with a collet clamp.

7. Connect the pump into the outlet

A warning lamp lights up on the control panel. Turn on the water supply in order to release air from the system. The pump begins to work, and water enters the hydroaccumulator. There should be noise of water.

After the release of the air, water begins to flow. Close the crane. Follow the testimony of the pressure gauge: the pump shutdown occurs after the pressure is injected 2.8 bar. Then let the water from the crane and check the pump work after the pressure is reduced to 1.5 bar. The pump is again in work. So, the work cycle is repeated.

If you tightly connected the entire system, then turning on and off the pump will be carried out according to its settings. The pump connection is successfully completed.

Detailed video instruction

The installation scheme does not differ in the high complexity of the work carried out, but requires careful and consistent execution of each stage of work. In order for the equipment to serve for a long time and there was no breakdown, take care of each stage of work. IN perfect version - Contact professionals for help.