D20ME 526-2005-216943 control module

GE D20ME 526-2005-216943 control module

The GE D20ME 526-2005-216943 is a specific model of a medium-voltage air circuit breaker from General Electric’s renowned D-Series.

Model Number Breakdown: D20ME 526-2005-216943

D: Product Line (D-Series Circuit Breaker)

20: Frame Size (2000 Ampere Frame)

ME: Interrupting Rating (65.000 RMS Amps at 508VAC; 35.000 RMS Amps at 635VAC)

526: Specific GE design/engineering code.

2005: Likely the year of manufacture or design revision (2005).

216943: Unique Serial Number for this specific unit.

Key Technical Parameters

These are the standard ratings for a D20ME breaker. Crucial Note: The actual ratings and certifications should always be verified from the nameplate physically attached to the breaker itself.

1. Basic Electrical Ratings

Frame Size: 2000 A

Rated Continuous Current (Iₙ): Typically 1200A, 1600A, or 2000A. The actual rating is set by the installed rating plugs and sensors. The frame is designed to handle up to 2000A.

Rated Maximum Voltage: 635 VAC

Rated Frequency: 50/60 Hz

2. Interrupting Capacity (Breaking Capacity)

This is the most critical safety parameter. The “ME” suffix defines this.

Maximum Symmetrical Interrupting Rating (ICR):

65 kA RMS Sym. at 508 VAC

35 kA RMS Sym. at 635 VAC

Short-Time Current Rating (Withstand):

65 kA RMS Sym. for a minimum of 12 cycles (0.2 seconds). This is its ability to carry a fault current without opening.

3. Insulation and Dielectric Strength

Power Frequency Withstand (1 min): 2200 VAC

Impulse Withstand (BIL): 10 kV

4. Control Circuit

Closing Mechanism: Spring charged motor operator (standard). Can be charged manually in emergencies.

Rated Control Voltage: Typically available in standard voltages like 24VDC, 48VDC, 125VDC, or 120VAC/240VAC. This is specified per order and must be checked on the nameplate.

5. Trip Unit (Protective Relay)

The original equipment likely came with a GE MM-25 (Micro-Matic) or similar electromechanical trip unit. These are often upgraded to modern digital trip units for enhanced protection and communication. The specific trip unit model and its settings (Long Time, Short Time, Instantaneous, Ground Fault) are configurable and must be verified on-site.

Trip Unit Type: Electromechanical (original) or Digital (common upgrade).

Adjustable Settings: Pickup (Ir), Time Dial (TD), Instantaneous (Ii), Ground Fault (Ig).

6. Physical Characteristics

Type: Drawout design. It can be physically moved into “CONNECT”, “TEST”, and “DISCONNECT” positions within its metal-clad switchgear cell.

Connections: Primary stabs (line and load) and secondary control connector.

Standards Compliance: Designed and tested to meet ANSI C37.13. C37.16. C37.17. C37.50. and IEEE C37.04. C37.09. C37.010.