Where to buy graphite electrode millivolt tester

Where to buy graphite electrode millivolt value tester

Functional features

ED0301H graphite contact switch tester needs to be matched with an intelligent high-voltage switch dynamic characteristics tester Used, the panel has three analog test channel interfaces, specifically testing the action characteristics of Siemens 3AQ and 3AT series graphite contact switches.

Testing principle

In order to test the dynamic resistance during the switching action, the four-wire wiring test method is used. Load a constant current of 10A on both ends of the graphite contacts of the circuit breaker (output only during testing), take out the voltage signals at both ends of the circuit breaker, and test the dynamic voltage change waveform within 200mV when the graphite contacts are in action to determine the circuit break. The position of the metal contacts and graphite contacts of the device.

Technical indicators

◆Constant current source input voltage: 220V±15%

◆Output current: 10A,

◆Ripple : ≤10mv,

◆Has good overcurrent and overheating protection.

◆Analog channel voltage measurement range: 0-200mv, and can withstand 24V fracture voltage.

◆The voltage judgment accuracy of the metal contact points of the moving and static contacts: <1mV.