An overview,

Zyjd-988 DC system grounding fault tester is a new generation of DC grounding fault tester. It can be applied to any voltage level of DC system, equipped with high-precision detection clamp meter, through the processing of a variety of signals greatly improve the detection range and anti-interference ability; Using algorithm and fuzzy control theory, the superiority degree of insulated branch is expressed in numerical form.

Two, technical indicators

1. Signal generator

Output signal frequency: 2Hz

Signal no-load output voltage: ±15V±5%

Signal voltage amplitude error: <5%

Signal short-circuit output current: ≤80mA

Impact resistance of output outlet: 400V DC impact

Power supply voltage: AC220V±10%

Voltage frequency: 50Hz±5%

Enter insurance: 200mA

Maximum power: 2W

Size: 275 * 225 * 100 mm

2. Signal receiver

Signal current detection sensitivity: 0.5mA

Signal generator impedance: 40KW

Maximum output current: 2.5 mA

Receiver display: numbers 0-19

Size: 195 x 100 x 30 mm

Volume: 38 x 69 x 30 mm

3, the whole machine

Maximum grounding resistance: 60K ω

Maximum detection capacitance: 20μF

Grounding resistance measurement accuracy :0-4.5K ω Error ≤0.5K ω

Grounding capacitance detection range: 3-60uF

Grounding capacitance measurement accuracy: 3-10uF error ≤1uF