Loop Impedance Testers

What is loop testing?
Loop testing is a quick, convenient and highly specific method of evaluating an electrical circuit for its ability to engage protective devices (circuit breakers, fuses, Ground-fault circuit interrupter).
There are 5 test methods:
• two-wire high-current
• two-wire no-trip with dc injection
• three-wire no-trip
• two-wire no-trip
• four-wire grid impedance testing

The main reason for earth loop impedance testing, is to verify that if a fault occurs in an electrical installation, sufficient current will flow to operate the fuse or circuit breaker protecting the faulty circuit within a predetermined time. The objective is to make sure that the circuit is disconnected fast enough to prevent overheating and possibly a fire.

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Description Price Loop Impedance Test Type Maximum Voltage Measurement Best Loop Test Accuracy Resolution PSC Display Non-Trip Loop Test Safety Category Display Type Battery Type Battery Life Power Source Dimensions Weight Height
RS庫存編號 198-435
製造零件編號LTW315-EU-BS
BrandMegger
HK$5,234.51
單位
2 Wire, 3 Wire 440V ±10% - - Yes CAT IV 300 V, IEC 61010 LCD AA 2000 Tests Battery 203 x 148 x 78mm 1kg 78mm
RS庫存編號 123-2239
BrandRS PRO
HK$1,354.14
單位
3 Wire - ±2% 0.01 Ω Yes - - LCD - - Mains 180 x 130 x 70mm 800g 70mm
RS庫存編號 2552562317
製造零件編號4118A (1)
BrandKyoritsu
HK$3,786.57
單位
- - - - - - - - - - - - - -
RS庫存編號 2552562318
製造零件編號KEW 4140 (1)
BrandKyoritsu
HK$7,228.92
單位
- - - - - - - - - - - - - -