EATON EHD3020 Molded Case Circuit Breaker, F-Frame, Ehd Type, 3-Pole, 20A, Load Side, 50/60 Hz

Eaton EHD3020 moulded case circuit breaker with F-frame provides overcurrent protection and safe switching in DC & AC systems. It is used in panelboards, switchboards and motor control centres for branch circuit protection.

Working Mechanism:

• The circuit breaker is opened when pressure is applied to the trigger.
• When faulty current flows through any part of the system, the trip coil of the breaker gets activated, thus moving away from each other and opening the circuit.

Features:

• This circuit breaker features 3-pole, 3-phase configuration for high-speed blow open action.
• It features a thermal-magnetic trip to provide both long-time and instantaneous current limiting protection.
• This circuit breaker has a 20A standard current rating and have a maximum interrupting capacity of 14kAIC at 480VAC.
• It is equipped with load side lug terminals for secure connection.

Standards and Approvals:

• UL

Frequently Asked Questions:

Q. What is the maximum operating temperature of Eaton EHD3020 moulded case circuit breaker?

A. This circuit breaker can be operated at temperatures up to 158 degrees F.

Q. How to install this circuit breaker?

A.

• Ensure that Eaton EHD3020 is the appropriate circuit breaker for the application.
• Use a bolt drilling plan to make sure that the mounting panel is pre-drilled. Only load-end support mounting holes are needed for panelboard mounting. Make sure that the panel cover is cut out to correct the escutcheon dimension in dead front cover applications.
• Mount the unit on the panel or mounting surface while making sure that the accessory wirings can be reached. Install & tighten the mounting screws, washers & nuts.
• Install an optional terminal end cover if required. Connect the line & load terminals andaccessory leads. Install terminal shield & interphase barrier if needed.
• Finally, check all the mounting & terminal connecting hardware.

Q. What causes moulded case circuit breakers to trip?

A. Overloading a circuit is the primary reason for frequent short-circuit tripping.

Q. What is the difference between MCCBs and MCBs?

A.

• MCBs protect items from current overloads while MCCBs protect equipment from fault currents & excess temperature rise.
• The tripping circuit of MCBs is fixed while MCCBs have a movable tripping circuit.
• MCBs have comparatively low interrupting ratings than MCCBs.