AECO MCB, A simple looking device is a perfect technological  combination of switching and protection devices to provide maximum protection with minimum cost. Such features have made AECO MCBs suitable for a wider variety of applications especially where MCBs were previously considered unsuitable.

Characteristic

Suitable for control and protection of circuits having imP9rtant transient currents such as large motors.

•  High short circuit making and breaking capacity.
• Current limiting for low let through energy and maximum safety
• Very good selectivity related to upstream circuit breakers and back up protection fuses.
• Protection to downstream switchgear applications and electrical equipment.
• Inexpensive, near fuseless, distribution systems since high short circuit, no costs of spare fuses and stocking.
• No faults due to ageing
• Various versions for specific applications.
• Compact dimensions and modular constructions.
• Wide range of DBs and consumer units for ease of installation.

Idealy suited for applications in DC circuits also. They cope with short circuit currents upto 1 kA.

The time constant (T=LR/C) of the consumer circuit is the decisive factor in interrupting DC currents. Voltages upto 220 V per pole can be switched at time constants < 5ms. The tripping characteristics may vary as per customer's requirement. Normal B, C or D characteristic AECO MCBs may be used upto 72V on d.c. upto 1.5 kA short -circuit capacity. The d.c. current does not have any effect on the tripping times in thermal range but the minimum current for instantaneous magnetic operation will be :t40% higher than at AC.
AECO DC MCBs are also designed for Railway applications as per SPEC/E-12/1/04.

AECO MCBs are available with four types of characteristic tripping curves for different types of applications they are put to. These curves are shown in the chart below.

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Suitable for small inductive loads such as small motors, air conditioners etc.