Eaton A200/A210/A250 Specification 5 Motor Controller Operating Manual

Eaton A200/A210/A250 Specification 5 Motor Controller Operating Manual

Product positioning

The operating manual for Eaton A200/A210/A250 5 motor controller (document number IL17054, effective May 2011, replacing the old version from June 1998) is positioned as an industrial grade full voltage starting motor controller, supporting irreversible or reversible control and providing motor overload protection (relying on overload relays and heaters), but does not have short-circuit protection function and needs to be used in conjunction with external short-circuit protection devices (such as fuses and circuit breakers). The product is suitable for driving and controlling three-phase motors in industrial scenarios, and only professional personnel who have received sufficient training are allowed to install, operate, and maintain it. Local and national electrical regulations and safety standards must be followed.

Core Technical Parameters

Category specific parameters

Pole configuration: 2-pole (current rating is the same as 3-pole, does not support three-phase motors), 3-pole (supports three-phase motors)

Voltage and power (60Hz) 200V: 75HP; 230V：100HP； 460/575V：200HP

Current specifications: open circuit starter: 300A; closed starter: 270A

Short circuit withstand current according to SCPD type: 65000A (Class J/K/R/T fuse), 100000A (HMCP model), 200000A (LA+TRI-PAC model)

The cable requires copper conductor, wire gauge 2/0 AWG-500 MCM, and is compatible with a current carrying capacity of 75 ℃

Working environment: Industrial environment, suitable for conventional temperature and humidity (no specific values, must comply with general electrical equipment standards)

Detailed explanation of core components and functions

Overload protection system

Component type, key characteristics, specification parameters

Type A overload relay is divided into temperature compensation (gray reset lever, marked as "ambient compensated") and non compensation (red reset lever, not marked); Support manual/automatic reset; With ± 15% setting adjustment; Normally closed control contact control circuit contact rating: AC 120-600V, connect 30A/3600VA, disconnect 3A/360VA

B-type overload relay is divided into temperature compensation (gray reset lever) and non compensation (red reset lever); When triggered, the yellow indicator pops up and hides after resetting; Normally closed control contact, optional normally open contact control circuit contact rating: AC 120-600V, connect 20A/2400VA, disconnect 2A/240VA

The heater needs to be ordered separately and selected based on the rated current of the motor and the service factor; The tripping current at 40 ℃ is 125% of the minimum rated current of the motor; Under 600% tripping current, the tripping adaptation current range is 100-300A within 20 seconds, corresponding to models FH23-FH34

Core Accessories and Functions

Operating coil: AC voltage adaptation (120V/240V/460-480V, etc.), some models support AC/DC conversion (requires matching control relays); The maximum suction power is 1700VA, and the holding power is 20-32VA; when replacing, the model, voltage, and frequency need to be checked.

Arc hood: Built in De ion ®  Arc extinguishing barrier, providing mechanical limit and arc extinguishing functions for contacts; Must be securely installed, otherwise operation is prohibited; Regularly check whether the grid is damaged due to malfunction.

J-shaped auxiliary contacts: up to 2 units can be installed, providing up to 4 auxiliary circuits; Supports configurations such as 2 normally closed, 1 normally open, and 1 normally closed (delayed disconnection); During installation, adjust the operating arm to ensure that the push rod can be pressed an additional 1/16 inch when the controller is fully closed.

GCO current transformer: 300/5 ratio, black casing with nameplate; The primary winding is implemented by a load connection strip, and the secondary winding (black and white wires) is connected to an overload relay; Prohibit secondary winding open circuit (to avoid overvoltage damage); Install a maximum of 3 and a minimum of 2 (on both sides).

Mechanical interlocking: Suitable for multi controller combination installation to prevent simultaneous closure; Vertical installation uses M47/M49 type, horizontal installation uses M48/M50 type.

Installation and wiring specifications

Installation Requirements

Installation posture: Vertical installation, with the incoming terminal located above the load terminal; The overload relay needs to be installed vertically with the reset rod facing downwards.

Fixed requirement: Tighten with designated bolts, with the following torque for key parts:

Component torque range (pounds inches)

Arc cover screws 15-18

Fixed contact bolt 150-175

Terminal bolt 55-65

Screw 125-150 for moving contact assembly

Environmental requirements: Avoid harsh environments such as dust and humidity, and ensure that the mechanism operates without any jamming.

Wiring specifications

Main circuit wiring: Inlet/outlet terminal aperture 17/32 inches, compatible with 1/2 inch hardware; The pressure type terminal is installed on the inlet side behind the copper terminal strip, and the load side is installed on the front side.

Control circuit wiring: The normally closed contacts of the overload relay are connected in series in the control circuit, and the coil power is cut off when triggered; Auxiliary contacts are wired according to control logic (such as self-locking and interlocking).

Transformer wiring: The black and white wires of the GCO secondary winding are connected to the corresponding terminals of the overload relay, and the same group of wires should be connected to the same overload relay pole; When wiring, avoid cables obstructing the movement of the crossbar.

Maintenance and replacement of accessories

Key points of daily maintenance

Contact inspection: The new contact overtravel is 13/64-17/64 inches. When worn to 1/16 inch, all poles need to be replaced simultaneously; Measure the contact pressure (initial 6-7 pounds, final 7.5-8.5 pounds), if the pressure is insufficient, replace the contact or spring.

Institutional inspection: The horizontal bar and spring move flexibly without any jamming; Electrical and mechanical interlocking installation and adjustment in place; The arc cover is undamaged and the arc extinguishing grid is intact.

Overload relay inspection: Regularly test the reset function, and confirm the environmental adaptability for temperature compensation type; The heater is firmly connected and the surface is clean without oxidation.

Key component replacement process

Operation coil replacement: Power off → Remove coil leads → Remove arc cover → Lower crossbar → Remove old coil fixing screws → Install new coil → Reset crossbar and arc cover → Reconnect wires → Manually test crossbar movement flexibility.

Contact replacement: Power off → Remove the arc cover → Lower the crossbar → Remove the moving contact assembly → Replace the moving and stationary contacts → Reset the spring and assembly → Tighten the fixing bolts (150-175 pound inches) → Install the arc cover.

Overload relay replacement: Power off → Remove wiring → Use 7/16 inch 8-32 screws to remove old relay → Install new relay (reset lever facing down) → Reconnect wiring → Test trigger and reset function.

Critical Safety and Taboos

Only trained personnel are allowed to operate. Before installation and maintenance, power must be turned off and no voltage must be confirmed;

Do not operate without an arc cover, otherwise it may cause arc danger;

GCO current transformer secondary winding must never be open circuited to avoid overvoltage damage to equipment;

2-pole controller cannot be used for three-phase motor control;

The automatic reset function cannot be used for 2-wire control circuits (to avoid accidental motor start-up);

When the heater burns out, the complete overload relay needs to be replaced, and the heater cannot be replaced separately.