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SEW 2820 EL Digital ELCB Tester
| Model Name/Number | 2820 EL |
| Brand | SEW |
- Microprocessor-controlled. ??? Operating voltage 100-450V L-E.
- Rated current 999mA, at 317V AC/50Hz.
- Checks ELCB trip time and trip point (sensitivity).
- Auto-off and auto ranging.
- Phase angle selection (0° / 180°).
- Indicates tripping phase angle.
- Impact resistant enclosure.
- Over temperature shut-down.
- Transient protection.
- Suitable for heavy industrial use.
- Fused. OPERATING PRINCIPLES EARTH LEAKAGE TESTS The testers may be used to check the trip point (Test 1) of the ECLB or the trip time (Test 2). Test 1 is normally used on instantaneous ELCB s while Test 2 is normally used to inverse and fixed time-delay ELCBs. TEST PROCEDURE Test 1-instantaneous ELCBs A ramp current, increasing at approximately 12 mA/s is introduced between L and E and the point at which the ELCB trips is recorded. To save time and reduce energy dissipation, the starting point of the ramp may be selected. Test 2-Inverse and fixed time delay ELCBs. A constant current is selected and injected between L-E and the tripping time is recorded.