The NV-ZLA series is an earth leakage relay from Mitsubishi Electric with selectable sensitivity settings such as 100, 200 and 500 mA. Used together with a zero-phase current transformer, it detects ground fault current and sends a signal to trip a breaker or raise an alarm. It provides earth leakage protection or monitoring for feeders and large-current circuits where an integrated earth leakage breaker is impractical.
| Part No. |
Class |
Mass (kg) |
Compliant Standards |
Connection Method |
Reset Method |
Configuration |
Optional Accessories |
Power Consumption (VA) |
Phase/Wire System |
Rated Sensitivity Current (mA) |
Continuous Current (A) |
| NV-ZLA 120.240V 100.200.500MA JIS/UL N |
Compatible earth leakage relay, harmonic/surge compatible type, mechanical latching type |
0.4 (relay) |
JIS/UL |
Surface type→○ wire fork terminal, Flush type→○ wire fork terminal |
Press the reset button (also serves as leakage indicator). |
(Built-in contact) 1a1c |
Terminal cover (TC-ZSA), flush mounting frame ○ (FP-NVZS) |
3 or less |
3Ø4W、3Ø3W、1Ø3W、1Ø2W |
100/200/500 switchable |
(Built-in contact) 5 |
| NV-ZLA 120.240V 100.300.500MA JIENUL/CEN |
Compatible earth leakage relay, harmonic/surge compatible type, mechanical latching type |
0.4 (relay) |
UL/CE |
Surface type→○ wire fork terminal, Flush type→○ wire fork terminal |
Press the reset button (also serves as leakage indicator). |
(Built-in contact) 1a1c |
Terminal cover (TC-ZSA), flush mounting frame ○ (FP-NVZS) |
3 or less |
3Ø4W、3Ø3W、1Ø3W、1Ø2W |
100/300/500 switchable |
(Built-in contact) 5 |
| NV-ZLA 120.240V 30.50.100MA UL/CE N |
Compatible earth leakage relay, harmonic/surge compatible type, mechanical latching type |
0.4 (relay) |
UL/CE |
Surface type→○ wire fork terminal, Flush type→○ wire fork terminal |
Press the reset button (also serves as leakage indicator). |
(Built-in contact) 1a1c |
Terminal cover (TC-ZSA), flush mounting frame ○ (FP-NVZS) |
3 or less |
3Ø4W、3Ø3W、1Ø3W、1Ø2W |
30/50/100 switchable |
(Built-in contact) 5 |
| NV-ZLA 240.440V 100.200.500MA JIS/UL N |
Compatible earth leakage relay, harmonic/surge compatible type, mechanical latching type |
0.4 (relay) |
JIS/UL |
Surface type→○ wire fork terminal, Flush type→○ wire fork terminal |
Press the reset button (also serves as leakage indicator). |
(Built-in contact) 1a1c |
Terminal cover (TC-ZSA), flush mounting frame ○ (FP-NVZS) |
3 or less |
3Ø4W、3Ø3W、1Ø3W、1Ø2W |
100/200/500 switchable |
(Built-in contact) 5 |
Confirm the control supply voltage, sensitivity range and matching ZCT. Please confirm the full part number and options against the MITSUBISHI ELECTRIC catalog; contact us if you need help identifying the right model.
Mitsubishi Electric is a Japanese manufacturer of factory automation and low-voltage power distribution equipment, including MELSEC PLCs, servo systems, inverters, magnetic contactors and starters, circuit breakers and measuring instruments.
