Description
General
JCQ series on-line monitor is an instrument to monitor the lightning arrester in the power system on-line. Installed in the earth line of the lightning arrester, this instrument combines a milliammeter with a discharge counter. The milliammeter indicates the leakage current flowing through the lightning arrester under the working voltage. Whether there is anything abnormal with the lightning arrester can be judged according to the milliammeter indication. The discharge counter counts the surges diverted by the lightning arrester.
The following field-proven features make the JCQ series the long-life, easy-to-use solution for monitoring the lightning arrester.
- Waterproof, Stainless structure
The JCQ series monitor is waterproof, and all the parts that touch air are stainless parts. This structure makes the JCQ series monitor a long-life instrument.
- counter panel
The discharge counter panel in the JCQ series is like a clock panel, which makes it easy to be watched from distance.
- LED warning indicator
The LED warning indicator in the JCQ series monitor will turn light to call the patrolman’s attention when the leakage current is bigger than the value preset according to the specifications of the lightning arrester.
Condition of use
(a). Outdoor or indoor
(b). Ambient Temperature: -40℃~+40℃
(c). Rated frequency: 50Hz or 60Hz
(d). No intense vibration at the place of installation
Ratings and Specifications
Item Type | JCQ-3A | JCQ-3B | JCQ-3C |
Full range of the milliammeter (mA, peak) | 10 | 5 | 2 |
2 mS rectangule wave impulse current withstand (A, peak) | 2000 | 800 | 400 |
Nominal impulse current(kA, peak) | 20 | 10 | 5 |
Residual voltage under nominal impulse current(kV, peak) | <1.5 | <1.5 | <1.5 |
The correct counting rate of counter under the nominal impulse current (%) | 100 | 100 | 100 |
Voltage of monitor at normal leakage current (V, r.m.s.) | <5 | <5 | <5 |
