Add-On Ground-Fault and Earth-Leakage Modules

GFM250 with Optional GFM25CT

The MicroLogic Ground-Fault Module (GFM) is a UL Listed/CSA Certified circuit breaker accessory which protects equipment from damage caused by ground faults. It is an add-on module which, when connected to a PowerPacT H- or J-frame thermal-magnetic circuit breaker only, provides ground-fault sensing and ground-fault relay functions.

HD/JD ground-fault modules feature:

• Adjustable ground-fault pickup levels

• Adjustable ground-fault time delays

• Integral ground fault push-to-test feature

• Ground-fault indicator (mechanical for local, contacts for remote)

• All GFMs are supplied for I-Line™ mounting as standard, easily convertible to unit mount by removing the I-Line bracket

• Fault-powered (through the sensing current transformer) for electronics, shunt trip, and integral test feature. Meets NEC 230.95(C)

• A 12 Vdc shunt trip module (Catalog No. P29382) is required in the circuit breaker. This may be field installed or factory installed when the circuit breaker is ordered with an -SN suffix.

• UL 1053 — Ground-fault Sensing and Relaying Equipment

The GFM system requires the following:

• H-frame (15–150 A) or J-frame (150–250 A) molded case circuit breaker

• Shunt trip is required for the function of the GFM (may be factory-installed or field-installed)

• Bus bar connection (terminal nut inserts) for OFF end of circuit breaker

• Optional neutral current transformer, catalog number GFM25CT (must be ordered for 4-wire applications).

  note

  Ground-fault modules cannot be used for alarming only.

J-Frame Unit Mount with ELM Installed

The Earth Leakage Module (ELM) is an add-on module which, when connected to a PowerPacT H- or J-frame MCCB, provides low-level ground-fault sensing and ground-fault relay functions.

Because these ELMs are highly sensitive (30 mA to 3 A), they provide much greater protection than GFMs (20 to 200 A sensitivity). The ELMs provide greater protection of control circuits and other sensitive equipment. The associated circuit breaker must have a 48 Vdc shunt trip, which may be field-installed (kit P29392) or factory-installed (suffix –SP) in the H- or J-Frame circuit breaker.

Add-on Earth Leakage Module (ELM) Features:

• Adjustable ground-fault pickup levels as low as 30 mA

• Adjustable ground-fault time delays from instantaneous to 500 msec
  (Time delay can be applied to the 30 mA setting)

• Integral ground fault push-to-test feature

• Ground-fault indicator; pop-up button for local status and contacts for remote indication (to be used only with the tripping option)

• All ELMs are supplied for I-Line™ mounting and are easily convertible to unit-mount by removing the I-Line brackets

• Three poles; 240 to 600 Vac maximum: 3-wire applications only (no neutral)

• Line-power obtained through internal bus to provide power for electronics, shunt trip, and integral test feature.

• A shunt trip is required in the circuit breaker; it may be field-installed or factory-installed in the PowerPacT H and J circuit breakers.

• UL 1053 – Ground-fault Sensing and Relaying Equipment