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KDJ low pressure leak selection device

KDJ low pressure leak selection device

Product Details

JD Leak Detection Relay


-.Overview


JD type leak detection relay is a product specially developed for supporting low voltage power distribution panels. This device can be used alone or in combination with the KDJ type low pressure leak selection device. When used alone, it is a fast leak detection relay with an operating time of ≤30MS (when 1KQ is grounded) and a delay of 300MS when used with a leak detection device. The device is divided into four voltage levels of 1140V, 660V, 380V and 127V. This device is suitable for underground-normal cabinet or ground low-voltage cabinet neutral point ungrounded system.


Technical index


Leakage resistance


1140V 20KQ 20%


660V 11KQ soil 20%


380V 7 KQ 20%


127V 2 KQ soil 20%


Action time: no delay: 1140V, 660V, 380V, 127V≤30MS (when 1K2 is grounded)


Delay: 1140V, 660V, 380V, 127V 300 ~ 400MS (when 1KQ is grounded)


(B) KDJ type low pressure leak selection device


Technical index


Leakage resistance


660V 11K0 20%


380V 7 KQ soil 20%


127V 2 K0 20%


Leakage blocking action resistance value


660V 22KQ soil 20%


380V 13KQ soil 20%


127V 4K0 20%


Action time


660V


380V≤30MS (when 1KQ is grounded)


127V


Applicable grid each phase to ground capacitance 0 ~ 1UF


Control power


220V, 127V 50HZ


Test of leak detection relay and leak selection device


1: Test of leak detection relay :.


A: The leak detection relay is only used for the neutral point ungrounded system power grid. The neutral point grounded power grid needs to be isolated by an isolation transformer;


B: Only one leak detection relay is allowed to be installed in each power grid. If other types of leak detection relays are installed in the power grid, the device will cause errors.


May not work or work properly;


C: The main and auxiliary ground electrodes of the device are well grounded.


2: Test of leak selection device:


A: The test of the leak detection device needs to cooperate with the leak detection device, that is, the company's matching leak detection relay is installed in the power grid:


B: The ground wire of the leak detection device is connected to the ground wire of the leak detection device;


C: The wiring of the leakage detection device is correct, especially the three wires of the power grid and the signal line of the transformer are correct;


D: The leak detection device needs to be set in the delay time;


F: Press the test button, this device will operate, other branch devices will not move, and the leak detection relay will not operate.

KDJ type low pressure leak selection device


I. Overview


KDJ low-voltage leak-selection is a product designed for low-voltage leak-selection in the low-voltage distribution panel of the neutral point ungrounded system. Compatible with JD type leak detection


The electrical appliances are matched to form a low-voltage power grid selective leakage protection system. Is a patented product with small size and complete functions (selective leakage and leakage closing)


Lock function) for easy installation.


This device has only one component box and one current transformer, which takes up less space.


The control power supply is a transformer, the voltage level is 127, 220, 380, 660VAC, and the outlet is mainly 16 connectors. The device contains components


Box, zero-sequence current transformer, terminal block with 16 plugs, the box is equipped with indicator light, small red button S1 and three-wire terminal, two wires are


External indicator light,-line is an external test button (for external test, another.-Line is connected to the ground); Type A can also use other terminals if special requirements are required


Sub;


Technical indicators


Leakage resistance


660V 11K soil 20%


380V 7 Kn 20%


127V 2 KQ soil 20%


Leakage blocking action resistance value


660V 22KQ soil 20%


380V 13KQ 20%


127V 4KQ 20%


Action time


660V


380V≤30MS (when 1KQ is grounded)


127V


Applicable grid each phase to ground capacitance


0 ~ 1UF


Control power


220V, 127V 50HZ

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