EDB-EPD, EGB-EPD, and EJB-EPD

Equipment Protection Device Circuit Breakers for Ground Fault Protection in NF Panelboards

Square D brand EDB-EPD, EGB-EPD, and EJB-EPD (Equipment Protection Device) circuit breakers are one-pole thermal-magnetic circuit breakers with integral equipment ground fault protection. The ground fault protection level is fixed at 30 milliamperes per UL 1053 and is designed to protect equipment from damage. These EPDs also provide branch circuit overload and short-circuit protection per UL 489 at 277 Vac. The EDB-EPD, EGB-EPD, and EJB-EPD circuit breakers mount in NF circuit breaker panelboards and interiors, each circuit breaker occupying two poles of space.

Benefits of EDB-EPD, EGB-EPD, and EJB-EPD Circuit Breakers

More than 90% of short circuits initially involve ground faults (also called earth leakage or residual current). Detecting ground faults before they reach hazardous levels helps to avoid damage to critical equipment. This allows preventative maintenance to be scheduled before damage occurs, thus minimizing costly downtime.

• Protects expensive electrical equipment from damage due to ground faults

• Reduces equipment and employee downtime by preventing damage from ground faults

• Provides warning that the equipment needs preventative maintenance

• Reduced potential for hazards associated with ground fault-related fires and equipment malfunction

Applications

The NEC permits the use of an EPD for heat trace as a means of preventing freezing of pipes, rain gutters, etc. Other applications include protection of well pumps and other electrical equipment.

• Oil and gas / chemical

• Pharmaceuticals

• Water and waste treatment

• Food and beverage

• Other applications that require 30 mA ground fault protection

Key Features

• Designed for 30 mA equipment protection in commercial and industrial applications. Ideal for use with heat trace, pumps, etc.

• Can be installed in any Square D NF circuit breaker panelboard (each EPD occupies two pole spaces)

• Provides equipment protection at 30 mA

• One pole at 277 Vac

• Continuous current ratings of 15, 20, 30, 40 and 50 A available

• Push-to-test button to test ground fault protection circuitry

• A wide range of interrupting ratings (AIR at 480Y / 277 Vac): EDB = 18 kA; EGB = 35 kA; EJB = 65 kA

• Thermal-magnetic trip curve identical to equivalent circuit breaker without ground fault protection

• Optional alarm switch with one normally open contact

• All amperages are UL Listed as HID (high intensity discharge); 15 and 20 A are UL Listed as SWD (switching duty rated)

• Ground fault protection meets UL 1053 and CSA C22.2 No. 144-M91 standards

• Overload and short circuit protection meets UL 489 and CSA C22.2 No. 5-02

How Equipment Protection Devices Operate

An EPD compares outgoing load currents with returning currents to determine if there is leakage of current to ground. If it detects a ground fault greater than 30 mA, the EPD will trip and display the “red flag” of the Visi-Trip™ indicator.

These Square D EPDs are also designed to minimize nuisance tripping in an environment with electrical noise or harmonics.

An optional factory-installed alarm switch provides a set of contacts to remotely indicate if the EPD is in the tripped position. The alarm switch does not distinguish between ground fault, thermal, or magnetic trip.

Testing

EPD circuit breakers include a black test button to test the ground fault circuitry, as required by UL 1053. Pushing the test button causes the circuit breaker to trip, placing the handle into the tripped (middle) position. When the circuit breaker is tripped (by ground fault, short-circuit, or overload conditions), the Visi-Trip trip indication (red flag) appears in a window on the front of the circuit breaker case.

EGB14030EPD

Accessories

• Optional alarm switch (bell alarm), factory-installed only–add BA suffix; (cable with #12—22 AWG Cu wire only)

• No other electrical accessories are available

• HPAFD handle padlock attachment (locks ON or OFF)