EATON XT series stabilizing pump control box

EATON XT series stabilizing pump control box

Product Overview

The Eaton XT series stabilizing pump controller (models XTJP and XTJY) is designed specifically for stabilizing pumps in fire and water supply systems, ensuring that the system pressure is maintained within the set range. This series of controllers supports two modes: direct start (full voltage start) and star delta start, suitable for motors with different power and starting requirements.

The XT series controller adopts Eaton's independently developed combination motor controller, which integrates circuit breakers and overload protection, with a compact structure and reliable performance. Its modular design, global certification standards, and rich optional features make it an ideal choice for industrial and commercial fire protection systems.

Startup method analysis

1. Direct start (full pressure start)

The XTJP controller adopts a direct starting method, and the motor is subjected to full voltage when starting, with a starting current of about 600% of the rated current. This method is suitable for low-power motors (usually not exceeding 50HP), with a simple structure and fast response.

2. Star Triangle Startup

The XTJY controller adopts a star delta starting method and is suitable for delta connected motors with six or twelve leads. When starting, the windings are connected in a star shape, with each phase winding voltage being 58% of the line voltage, starting current being 33% of the normal locked rotor current, and starting torque being 33% of full voltage starting. After adjustable delay, switch to triangle connection and enter normal operation state. This method effectively reduces start-up shock and is suitable for high-power motors or situations with limited grid capacity.

Core components and structural characteristics

1. Combination motor controller

All XT series stabilizing pump controllers come standard with Eaton combination motor controllers, which integrate circuit breakers and overload protection into one, simplify wiring, save space, and improve reliability.

2. Sealed rotating handle mechanism

The controller is equipped with a rotating handle that can be locked in the OFF position to ensure maintenance safety. The handle is mechanically interlocked with the circuit breaker to prevent the cabinet door from opening when the handle is in the ON position (unless the interlock is released using a tool).

3. XT series power control components

The XT series controller adopts Eaton XT power control components, designed specifically for the global market, with small size, wide voltage range, easy installation and maintenance, and modular plug-in structure supporting quick replacement.

4. 120V control power transformer

All controllers come standard with a 120V control power transformer to provide stable power supply for the control circuit.

Technical parameters and selection

Direct Start Controller (XTJP)

Voltage range and power range

200 - 208V 1/3 - 15HP

220 - 240V 1/3 - 40HP

380 - 415V 1/3 - 50HP

440 - 480V 1/3 - 50HP

550 - 600V 1/3 - 50HP

120V single-phase 1/3-10HP

240V single-phase 1/3-10HP

Star Triangle Start Controller (XTJY)

Voltage range and power range

200 - 208V 1/3 - 15HP

220 - 240V 1/3 - 40HP

380 - 415V 1/3 - 50HP

440 - 480V 1/3 - 50HP

550 - 600V 1/3 - 50HP

Withstand current

The minimum withstand current of the controller is 18kA (symmetrical), suitable for three-phase systems ranging from 208V to 600V and single-phase systems ranging from 120V/240V.

Installation and wiring specifications

1. Installation location

The controller should be installed as close as possible to the controlled motor and fixed to the wall. There should be sufficient space at the bottom of the cabinet to ensure that cable entry complies with regulations. The controller must not stand on the ground and must be securely fixed with bolts.

2. System pressure connection

The controller comes standard with a ¼ inch NPT internal thread pressure interface, located on the bottom outer side of the cabinet. The connecting pipeline of the pressure sensor should be clean and free of pollution, and the pressure value should not exceed the rated range of the sensor.

3. Electrical connection

All electrical connections must comply with national and local electrical regulations. The incoming voltage terminals L1, L2, L3 and the grounding terminal are located at the top of the circuit breaker. Before wiring, it should be confirmed that the nameplate parameters (voltage, power, model) are consistent with the actual ones.

Debugging and Running

1. Motor steering inspection

After power on, turn the H.O.A switch to the "HAND" position and immediately return to the "OFF" position, and observe the direction of the motor rotation. If it is incorrect, disconnect the power supply and adjust the phase sequence of the contactor load terminal or motor terminal.

2. Start stop test

Place the H.O.A switch in the "AUTO" position. If the system pressure is lower than the set value (1Lo), the controller will automatically start the water pump. After the pressure reaches the stop point (1Lo+HYs), the pump will automatically stop. If equipped with a running time timer, stop the pump after running for the set time.

3. Overload protection setting

The setting value of the overload relay should be consistent with the full load current on the motor nameplate. The setting value of the circuit breaker is set according to the label inside the cabinet.

4. Run time timer (optional)

The timer panel is equipped with three rotating dials that can set the running time. The default function is "Single Trigger" (Ws), which means that the control signal is triggered and runs for a set time. During this period, it can be triggered multiple times, but the next cycle can only be started after the complete running cycle.

Digital Display Screen and Programming

The XT series controller comes standard with a digital display screen, which displays system pressure, start pressure, and stop pressure in real-time. The display screen is NEMA 4X protection level, with four red LED highlights, supporting pressure unit switching and alarm indication.

Programming steps (using factory default values as an example):

Enter programming: Press and hold the PGM key to display 'run'.

Input type setting: Press the ↑ key to display "inp", press the → key to select "4.20" (4-20mA input).

Decimal point setting: Press the ↑ key to display "dp" and "1000", no need to modify.

Offset setting: Press the ↑ key to display "OF" and "+0000", no need to modify.

Full range setting: Press the ↑ key to display "FS" and "+0500", no modification required.

Relay 1 high alarm: Press the ↑ key to display "1Hi" and "+9999", no modification required.

Relay 1 low alarm (starting pressure): Press the ↑ key to display "1Lo" and "+0000", press the → key to move the cursor, and use the ↑↓ keys to set the starting pressure value (such as "+0100" displayed at 100psi).

Relay 2 high alarm: Press the ↑ key to display "2Hi" and "+9999", no modification required.

Relay 2 low alarm: Press the ↑ key to display "2Lo" and "-9999", no modification required.

Return difference setting: Press the ↑ key to display "HYS" and "+0000", press the → key to move the cursor, and use the ↑↓ keys to set the return difference value (such as stopping the pressure at 115psi and setting the return difference to+0015).

Exit programming: Press the ↑ key to display "run" and return to the pressure display interface.

Default parameter value table

Default parameter range

Input type 4.20 4-20mA/0-10V, etc

Decimal point 1000 1.000-1000

Offset from 0-9999 to 9999

Full range 500-9999 to 9999

Relay 1 high alarm 9999-9999 to 9999

Relay 1 low alarm (start) 000-9999 to 9999

Relay 2 high alarm 9999-9999 to 9999

Relay 2 low alarm -9999-9999 to 9999

Return difference 10 0 to 999

Optional features and extensions

The XT series controller offers multiple optional functions to meet different application needs:

Additional contacts: pump operation indicator, power failure indicator

Special enclosures: NEMA 3R (rainproof), NEMA 4 (waterproof), NEMA 4X (stainless steel), NEMA 12 (dustproof)

Tropical protection treatment

Power indicator light, pump operation indicator light

Low pressure water inlet switch and alarm

Space heater (with temperature or humidity control)

sequential startup

Running time timer, cumulative running schedule

Certification and Standards

The XT series stabilizing pump controller meets or exceeds the following standards:

UL 508 Industrial Control Equipment

CSA Canadian Standards Institute Certification

New York City Building Code

NFPA 20 Fire Pump Installation Standard (Pressure Connection Section)

The controller housing standard is NEMA 2 (anti drip), with optional NEMA 3R, 4, 4X, 12, etc.