Category: Impedance testers
Kew Combitester provides the ultimate in Microprocessor technology offering Loop and RCD tests with a comprehensive memory and downloading test results.
LOOP Impedance 200/2000Ω range measurement is carried out using a test current of 15mA. This current will not trip RCD’s rated at 30mA or greater.
High resolution for low Loop Impedance (resolution of 0.01Ω) on 20Ω range.
Direct reading of Prospective Short Circuit Current (PSC) and earth fault current.
RCD tests at 0 and 180 degree phase angle switch permit quick tests and consistent readings.

Test of a large kind of RCD's Standard, Selective, AC and A (DC sensitive breakers).
Constant current source circuitry ensures that a fluctuating mains voltage does not affect the accuracy of readings.
RCD Ramp test in order to indicate the actual tripping current of RCD.
Contact Voltage Reading (UC). with two selectable contact voltage limits
(50 and 25V).
Visual indication of correct wiring status and automatic lock-out if test resistors overheats.
Designed to IEC 61010-1, IEC 61557 and high protection degree IP54.
The stored data can be transferred to PC via Optical Adapter Model 8212-RS232C and 8212-USB.
Loop Impedance Ranges
(Z reading)
Loop Impedance Ranges
without tripping RCDs
200 and 2000Ω with 15mA of test current
Max test current on Loop ranges 3A (20Ω) / 15mA (200 and 2000Ω)
PSC / Earth Fault Current Ranges 200/2000A/20kA
RCD Test AC Type
(Standard and Selective)
|× 1/2
|× 1
|× 5
Auto Ramp
10, 30, 100, 300, 500, 1000mA
10, 30, 100, 300, 500, 1000mA
10, 30, 100mA
10, 30, 100, 300, 500mA
RCD Test A Type
(Standard and Selective)
10, 30, 100, 300, 500mA
RCD Test Currents multipliers |× 1/2, × 1, × 5
(max 1000mA type AC)
(max 500mA type A)
RCD Test Time Duration 1000ms: × 1/2, × 1, DC
200ms: × 5, DC (500mA), and × 1 (1000mA)
RCD Ramp Test From 20% to 110% of IΔn (AC type)
Contact Voltage Block (RCD) 50V and 25V
Contact Voltage Reading (RCD) 100.0V
Phase and Earth
(2 wires only) measurements
RCD (without DC)
Working Voltage for Loop Tests 20Ω: 230V+10%-15%
200/2000Ω: 230V+10%-15% and 400V+10%-15%
Working Voltage for RCD Tests 230V+10%-15%
Voltage Test 100 ~ 260V
(LOOP 200/2000Ω, PSC 200A:100 ~ 440V)
Memory 300 memory locations
PC Software, Connection Cable optional with 8212-USB, 8212-RS232C
Safety Standards IEC 61010-1 CAT.III 300V, IEC 61557
Power Source 8 × 1.5V R6P(AA)
Dimensions 186(L) × 167(W) × 89(D)mm
Weight 980g
Accessories Included Molded Plug Test Lead 7125-EU
Pouch for Test Leads
Instruction Manual
Shoulder Strap
Optional Accessories 7121B (Simplified measurement probe)
(RS232C adaptor with KEW Report (Software))
(USB adaptor with KEW Report (Software))


Ask about this product