MELPRO-D
64Pages

MITSUBISHI Numerical Protection Relay MITSUBISHI Numerical Protection Relay Mitsubishi ELectric corporation's PROtection relay for Distribution. HEAD OFFICE CAUTION TO PREVENT IT FROM THE RISK OF DAMAGE AND MAL FUNCTION, BE SURE TO READ OPERATING AND MAINTENANCE (SERVICING) INSTRUCTIONS BEFORE USING. : 7-3 MARUNOUCHI 2-CHOME, CHIYODA-KU TOKYO, 100-8310, JAPAN We are waiting your technical contacts by FAX. ATTN. Protective relay technical service FAX NO. JAPAN +81-78-996-7074 Relays suitable for advanced network systems and strongly support power distribution automation.

Safety section This Safety section should be read before starting any work on the relay. Be sure to read the instruction manuals and other related documents prior to commencing any work on the relay in order to maintain them in a safe condition. Be sure to be familiar with the knowledge, safety information and all caution items of the I Caution means that failure to un-observe safety information, incorrect use, or improper use may endanger personnel and equipment and cause personnel injury or physical damage. Items as classified to the caution may become to occur more sever results...

Request when placing order Thank you very much for your usual selecting the MITSUBISHI ELECTRIC CORPORATION products. When ordering our products described in this catalogue, please read and agree the followings before ordering as long as any special condition are not nominated in the offer document, contract document, catalogue other than this. The guarantee period of this product should be one year after delivery, unless otherwise specified by both parties. When any fault or defect is detected during the period of guarantee and such fault or defect is proved to be caused apparently at the...

Relays suitable for advanced communication network systems contribute to build the automated power distribution. To improve the reliability of distribution system is quite essential for the stable operation of all facilities installed in the factories and buildings. In order to realize high reliable distribution system, more functional protection relay as the core for the protection and control systems is essentially required. Through passing the age of the electric mechanical type relay and the transistor type relay, today, the main stream of protection relay has been moved to the...

Mitsubishi Numerical type protection relay Programmable output contacts complying with requirements on the flexibility The operating output contacts can be set by combing the outputs of the protection relay element using "OR" logic, thereby simplifying sequence design. Also, it is possible to reduce the cost of switchboard as reducing wiring works. Output sequence with using "OR" logic [Schematic image of programmable output (Example: type COC4-A01)' Substantial measuring function Substantial metering function Possible to measure the steady state of the relay input values (Current, Voltage,...

Common Technical Data VN: Rated voltage IN: Rated current

COC Series OVER-CURRENT RELAY Type, rating and specification A ^Please refer to the instruction manual regarding the details on this specification

^Please refer to the instruction manual regarding the details on this specification.

^1 Common condition! (l) Rating Frequency (2) Ambient temperature:20°C (3) Auxiliary power supply: Rating voltage

1. Guarantee against interruption of AC power supply When an uninterruptible AC power source is not available in your system for the auxiliary power supply, use the type B-Tl AC/DC converter or commercially available uninterruptible power supply (UPS). In addition, possible duration of the power supply type B-Tl AC/DC converter is confirmed as about 2 seconds in combination with one MELPRO-D series relay. Therefore, in the case that the required duration of power supply after power source loss exceeds 2 seconds, please use a suitable commercial uninterruptible power supply. When power...

Operation time and Reset time characteristics The time-delayed element have 12 kinds of operation characteristics as shown on Fig.1-1 and Fig.1-2, and 3 kinds of reset time characteristics as shown on table 1-1. ■ Inverse time-delayed characteristic for reset Following the principle of resetting an electromagnetic mechanical type induction disc, the inverse time-delayed characteristic given by the equation below is used for computing the reset time of the internal operation timer, although the output contact will be reset after a definite period of time (0.2 s). The inverse time-delayed...

Sample of external connection diagram power supply Self diagnosis output Programmable output (Default setting at ex-works) Fig.1 -3 COC1-A01D1 (Phase fault protection) Self diagnosis output Programmable output (Default setting at ex-works) Fig.1 -4 COC1-A01D1 (Solidly grounded neutral system, Earth fault protection) The connection diagram shows concepts of the wiring only. Therefore, please note that there will have some difference between the connection diagram and actual installation status of CT.VT and safety devices such as fuse, etc.

power supply Self diagnosis output Programmable output Default setting at ex-works) 'iThe terminal number A-05 is changed to A-07 and A-06 is changed to A-08 in case of COC1-A01D1 type Example: 100A grounding system power supply Self diagnosis output Earth fault • Earth fault • Programmable output Default setting at ex-works) Fig.1 -6 COC1-A02D1 (Earth fault protection) The connection diagram shows concepts of the wiring only. Therefore, please note that there will have some difference between the connection diagram and actual installation status of CT,VT and safety devices such as fuse, etc.

Example: 100A grounding system power supply Self diagnosis output Earth fault • Earth fault • Programmable output (Default setting at ex-works) Fig.1 -7 COC1-A02D1 (Earth fault protection) power supply Self diagnosis output Programmable output DA (Default setting at ex-works) Fig.1 -8 COC2-A01D1 (Phase fault protection) The connection diagram shows concepts of the wiring only. Therefore, please note that there will have some difference between the connection diagram and actual installation status of CT.VT and safety devices such as fuse, etc.