Tianmu brand SDLB-9F Ⅱ leakage relay is a high-tech product developed to solve the problems of single function and outdated performance of current combined residual current action relays, especially the inability to protect against transformer overload. The product also solves the problem of inconvenient management caused by the lack of instrument display function in distribution boxes. The product integrates functions such as leakage protection, automatic reclosing, and overcurrent protection, and displays parameters such as three-phase load current, voltage, and leakage current on a Chinese LCD screen. It is the first of its kind in China and is currently an ideal product for rural power grid safety management.

This product is combined with an AC contactor or circuit breaker to form a leakage protection device. It is mainly used to protect the circuit from ground faults, prevent equipment accidents or electrical fires caused by this, and can also be used to provide indirect contact protection against personal electric shock hazards. This product is suitable for 380/220V low-voltage distribution systems with a neutral point directly grounded.

This product complies with the GB22387 standard, has passed the national CCC mandatory certification, and is covered by product liability insurance provided by Ping An Insurance Company of China.

Product features:

1. Equipped with leakage and transformer protection functions (Note 1) and automatic reclosing function

2. The leakage action value can be manually adjusted or intelligently adjusted by tracking the line condition

3. Chinese LCD displays three-phase load current (Note 1), AC voltage (Note 2), and leakage current

4. The overcurrent protection value can be adjusted according to the transformer capacity or actual needs (Note 1)

5. Automatically display the reason for tripping and fault current after tripping

6. Can query the occurrence time and fault current value of each trip

7. Count the number of trips and tripping locks (this month, last month, total)

8. Identify and separate surge leakage currents (similar to animal electrocution waveforms)

9. Equipped with 485 communication interface, compatible with multiple communication protocols

Note 1: A dedicated load current transformer is required. Note 2: Only the fully functional type has it

Technical parameters:

1. Rated voltage: 380V

2. Rated current: 250-630A

3. Rated frequency: 50Hz

4. Rated residual operating current: 75mA \ \ 150mA \ \ 300mA \ \ 500mA or 150mA \ \ 300mA \ \ 500mA \ \ 1000mA

5. Breaking time (I Δ n): ≤ 0.3S, ≤ 0.5S (adjustable)

Minimum non driving time (I Δ n) 0.13S

6. Rated insulation voltage: 400V

7. Auxiliary power supply voltage: 220V

8. Action characteristic category: AC type

9. Breaking time classification: S-type

10. Relay contact output capability: 3A/220V

11. Short time withstand current: 3000A

12. Rated fuse tube capacity: 2A/5A

13. Closing time: 20-60 seconds

Operating instructions:

1. Operating environment

1.1. Environmental temperature: -20~55 ℃

1.2. Relative humidity: ≤ 90%

1.3. Altitude: ≤ 2000 meters

1.4 Pollution level: Level 3

2. Before installation, first confirm that the neutral wire on the low-voltage side of the transformer is directly grounded, and the grounding resistance should be less than 10 ohms. The protective grounding of the user's original electrical equipment must be removed and replaced with protective grounding. The neutral wire passing through the zero sequence current transformer shall not be grounded repeatedly, and the phase and neutral wires passing through the zero sequence current transformer shall not be mixed with other lines.

3. The installation position of zero sequence current transformers should be far away from power transformers, high current busbars and other strong magnetic field interference sources, with a minimum of 25cm above and below, left and right, and front and back. The direction marked on the transformer is the load side, and the three-phase phase line and neutral line pass through the center hole of the transformer. Be careful not to reverse them.

If equipped with a load current transformer, pass the A, B, and C three-phase cables through the load current transformer separately.

4. Fix the installation panel onto the cabinet or wall, and hang the protector securely. According to the model of the protector, wire according to the wiring diagram requirements in this manual.

5. Plug in the transformer plug, check the wiring for errors, and then close the leakage relaypower switchIf the LCD screen is on and the trip indicator light is not on, it indicates that the protector is closing normally. The LCD screen displays as