Tianmu brand TZB/(400) 630.3N-H residual current operated circuit breaker is the latest product developed and researched by our company to improve the load switching performance of low-voltage power grid terminals. It integrates leakage protection, leakage fault automatic reclosing mechanism, overload and short circuit protection, and has the characteristics of easy installation and reasonable structure.

This product is suitable for low-voltage distribution systems with three-phase four wire neutral point directly grounded, used for ground fault protection of the line. To prevent equipment accidents or electrical fires caused by this, it can also be used to provide indirect contact protection against personal electric shock hazards. Widely applicable for overall protection of industrial and mining enterprises, distribution transformers, orderly use of electrical load control switches, and timely control switches.

This product complies with the GB14048.2-2008 standard, has passed the national 3C mandatory certification, and is covered by product quality liability insurance provided by Ping An Insurance Company of China.

Product features:

1. It has functions such as short circuit, overload, undervoltage, overvoltage, phase loss, zero break, and leakage protection.

2. The leakage action value can be manually adjusted, or the leakage action value can be automatically adjusted by tracking the circuit leakage.

3. The overload protection value can be adjusted according to the transformer capacity or actual load demand.

4. Digital display of three-phase load current, three-phase voltage value, and line leakage current value.

5. After tripping, the tripping reason and fault current can be automatically displayed.

6. It has automatic and manual closing functions, making it convenient for users to use.

7. When the leakage alarm function is activated, only the leakage value is displayed, and if the leakage exceeds the limit, only the alarm will be triggered without tripping.

8. Built in communication interface, capable of remote control, telemetry, and remote signaling functions.

9. Can query the reasons and occurrence times of previous trips (optional)

10. The function of distinguishing sudden wave currents (similar to sudden waveforms of animal electric shocks) can be set. (Optional)

Technical parameters:

1. Rated current 250A, 315A, 400A, 500A, 630A

2. Rated voltage 380V

3. Rated insulation voltage 690V

4. Rated frequency 50Hz

5. Rated auxiliary power supply voltage 220V

6. Surge leakage action value ≤ 50 mA

7. Rated residual operating current 50/100/200/300/500/1000mA (adjustable)

8. Rated residual non operating current ≥ 1/2I △ n

9. Remaining current interruption time 0.5S/0.3S (adjustable)

10. Maximum non driving time 0.2S, 0.1S, 0.06S (adjustable)

11. Delay reclosing time 20-60 seconds, reclosing once

12. Action characteristic category AC type

13. Splitting time classification S-type, delay type (adjustable)

14. Rated ultimate short-circuit breaking capacity (Icu) L-type: 25KA, M-type: 50KA, H-type: 65KA

15. Rated operating short-circuit breaking capacity (Ics) L-type: 25KA, M-type: 25KA, H-type: 50KA

16. Rated residual short-circuit making and breaking capacity (I △ m) L-type: 6.25KA, M-type: 12.5KA, H-type: 16.25KA

17. The adjustable range of load current is 200-400A and 200-630A, with 20A per level

Operating instructions:

1. Working environment

1.1 Environmental temperature: -40~60 ℃

1.2 Relative humidity: ≤ 90%

1.3 Altitude: ≤ 2000 meters

1.4 Pollution level: Level 3

1.5 The circuit breaker should be installed in a dry, ventilated, dust-free, and free of harmful gases, away from magnetic fields and vibration. It should be vertically fixed on the distribution box or wall for easy operation.

2. Instructions for use

2.1 Power transmission

Set the power switch of the circuit breaker to the "ON" position, and the "Trip" indicator light will start flashing (indicating a closed waiting state). The electric closing mechanism of the circuit breaker will operate. When the circuit breaker is fully closed, it will be in the normal closed state, and the "Trip" indicator light will turn off.

2.2 Power off

Set the circuit breaker [power switch] to the [off] position, trip the circuit breaker, and turn off the main circuit.

2.3 Leakage over limit tripping test:

Press the [Test] button, and the circuit breaker should be able to trip. The [Leakage] indicator light will turn on, and the [Trip] indicator light will turn on. After about 5 seconds, the [Trip] indicator light will start flashing (the electric closing mechanism is running and waiting for closing). The electric closing mechanism will complete automatic closing within 20-60 seconds. After the closing is in place, the trip and leakage indicator lights will turn off.

2.4 Setting of leakage action value:

Manual adjustment and automatic adjustment can be selected as needed

According to the magnitude of the leakage current in the circuit, the leakage action value range of the circuit breaker can be manually set, or the leakage action value can be automatically set to levels I, II, III, and IV. According to different specifications, the leakage current of each gear corresponds to: gear I: 100mA gear II: 300mA gear III: 500mA gear IV: 1000mA. (Optional according to requirements)

Press the 【 Set 】 key to set the gear, and continuously press the 【 Set 】 key to cycle between gear I, gear II, gear III, gear IV, and gear III; Press and hold the 【 Settings 】 key for 3 seconds to enter automatic gear setting. When the gear indicator light is constantly on for a certain gear, it is a manually set fixed gear. When the gear indicator light flashes, it is an automatic gear. If the circuit breaker has a gear memory function after shutting down and turning on after a power outage when in a fixed gear, the gear will remain unchanged from the original gear; If it is in automatic mode, the circuit breaker will automatically set the gear according to the leakage of the line after shutting down and turning on after power failure.

2.5 If the circuit breaker trips due to overload or short circuit, it cannot automatically close. The power switch of the circuit breaker needs to be turned off and reconnected before power can be restored.

2.6 The auxiliary power supply used for the internal electronic circuit of this circuit breaker is N and 5 poles. If used for three-phase power protection or specifically for single-phase protection, N poles must be connected to the neutral line and 5 poles must be connected to the phase line. Otherwise, power cannot be transmitted or manually closed without leakage protection.

2.7 When power outages are not allowed or when power must be supplied due to leakage faults in the maintenance line, press and hold the [Alarm] button for about 5 seconds to activate the alarm function. The [Alarm] light will turn on, and at this time, only the [Leakage] indicator light will turn on when the leakage exceeds the limit, without tripping. The use of this feature must be approved by the local power department. After entering the alarm state, press and hold the [Alarm] button for about 5 seconds to restore the leakage tripping function.

The 2.8 opening and closing indicator block is used to indicate the opening and closing status of the circuit breaker.

When the leakage tripping does not require automatic reclosing function or the internal closing motor is damaged, manual closing can be used. Use an Allen wrench to turn the device clockwise to the closing state and then stop (when the indicator block is "closed"). If manual opening is required, then turn the device clockwise to the opening state and stop. If manual closing is required again, the protector [power switch] must be opened and closed again, and then the device must be turned clockwise to the closed state before stopping.

2.10 The digital display cyclically displays A □□□, B □□□, C □□□, A. □□□, B. □□□, C. □□□, L □□□, and F □□□ as three-phase current value (A), three-phase voltage value (V), leakage current value (mA), and load current control value (A), respectively. Press the [Function] key and the digital display will show the following parameters in sequence:

-AA - represents the leakage phase A

E005- Refers to 5 cumulative trips

H003- Refers to the cumulative number of tripping and locking operations of 3 times

R=05- represents an S-shaped breaking time of 0.5S

R-05- represents a delay type interruption time of 0.5S

D=01- indicates communication address setting

7b=0- indicates surge protection setting

9H=0- indicates phase loss protection setting

2.11 When the circuit breaker trips, the digital display will flash to show fault information

a. Leakage fault tripping

Display the fault current and tripping phase alternately, while the [leakage] and [tripping] indicator lights are on.

Example: If L345 → - AA - is displayed, it indicates that this trip is a leakage trip, with a fault current of 345mA and A-phase leakage. If - Cd - is displayed, it indicates a surge leakage trip.

b. Under overvoltage tripping

Trip display -9Y - indicates undervoltage tripping, and the 'Trip' light is on at the same time. After the power supply voltage returns to normal, the circuit breaker automatically closes and supplies power.

c. Load control trip

The digital display flashes and alternately displays the load current values of each phase before tripping, while the [overcurrent] and [trip] lights are on.

2.12 Trip Record Query: Press the [Function] button continuously to make the digital display show EXXX (XX is the number of trips), then hold down the [Function] button for 3 seconds to make the digital display show E=XX, and then press the [Settings] button to display the reason for the most recent trip. To view the next item, first press the [Function] key and then press the [Settings] key; To exit, press and hold the [Function] key for 3 seconds to make the digital display show LXXX and display the status of various parameters normally.

2.13 Breaking time setting: Continuously press the [Function] key to display R=05 on the digital display. Then press and hold the [Function] key, and then press the [Setting] key to set R=03 to change the breaking time to 0.3S. (The default breaking time is 0.5S at the factory.) Delay type breaking time setting: Continuously press the [Function] key to display R=05 on the digital display. Then press and hold the [Function] key, and press the [Setting] key to set R-05 or R-03 to enter the delay breaking time. At this time, the protector trips without the reclosing function. (This function needs to be optional)

2.14 Communication Address Setting

Press the [Function] key continuously to display d=01 on the digital monitor. Then press and hold the 【 Function 】 key first, and then press the 【 Settings 】 key to set d=02 (03, 04).

2.15 Surge protection setting

The surge protection function is turned off by default at the factory and can be turned on when needed.

Press the 【 Function 】 key continuously to display Tb=0 on the digital display. Then, hold down the 【 Function 】 key and press the 【 Settings 】 key to set Tb=1, and the surge function will be activated. To cancel, repeat the above steps.

2.16 Phase loss protection setting

Press the 【 Function 】 key continuously to display 9H=0 on the digital monitor. Then, hold down the 【 Function 】 key and press the 【 Settings 】 key to set 9H=1, and the phase loss function will be activated. To cancel, repeat the above steps.

2.17 Load control current setting

Continuously pressing the [Function] button will cause the digital display to show FXXX, where XXX represents the negative control current value. At this time, hold down the [Function] button first, and then press the [Settings] button. Each time you press the [Settings] button, the load control value will change once; Press the desired value, release the two buttons, and wait for a period of time before automatically confirming and saving.