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GETTING STARTED
1.4
HID OVERVIEW
High Impedance Differential protection is a well-known principle where stabilizing resistors provide immunity against
external faults. HID modules provide resistors together with voltage limiters (MOV) to be used with a high-speed
overcurrent relay in order to obtain a high impedance differential protection scheme. External CT's are differentially
connected exactly as for traditional high impedance differential protection relaying.
FIGURE 1-4 TYPICAL APPLICATION OF AN HID AS A BUSBAR DIFFERENTIAL PROTECTOR
GEK-113064
HID High Impedance Differential Module
1-5
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Questions and answers
Wiring diagram for HID30 (w/o latching relays) is missing. Only for HID32 is available. Please provide it. Thank you!
The wiring diagram for the GE Multilin HID30 without latching relays can be found in the external wiring diagram section of the manual. It is advised to check the corresponding external wiring diagram specific to the HID model being used.
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