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AUMSHIVAY MC 12A Manual

Feeder protection relay
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TM
AUMSHIVAY ENGINEERING PRIVATE LIMITED
Feeder Protection Relay (MC12A);
relay with one measuring element. The relay can be used for feeder protection in all low voltage, medium voltage and high
voltage sub-stations. The relay has a built in high set facility. DIP switches are provided on the front panel for pick up and
time delay settings. User has a choice of 7 trip time characteristics.
FEEDER PROTECTION RELAY (MC12A)
Item
Feeder Protection Relay
Make
L&T
Model
MC 12A
1 phase, non-directional, Over Current or
Specifications
Earth Fault Relay
The relay can be used for feeder protection in
all low voltage, medium voltage sub-stations.
Applications
The relay has a built in high set facility. DIP
switches are provided on the front panel for
pick up and time delay settings.
Dual CT Rating
Draw out type construction
Features
Micro controller based design
7 types of trip time characteristics available
TM
REG. OFFICE:VILLA NO. 60,LATA NAGAR, KALWAR ROAD, JHOTWARA, JAIPUR - 302012
 B-21, Bhan Nagar, Queens Road, Jaipur-302021
Website: www.aumshivay.com, www.omengineering.in
E-mail:admin@aumshivay.com
FEEDER PROTECTION RELAY
Relay MC12A is a single phase, non-directional, over current or Earth fault
PAGE. 1

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  • Page 1 AUMSHIVAY ENGINEERING PRIVATE LIMITED  B-21, Bhan Nagar, Queens Road, Jaipur-302021  Website: www.aumshivay.com, www.omengineering.in  E-mail:admin@aumshivay.com FEEDER PROTECTION RELAY Feeder Protection Relay (MC12A); Relay MC12A is a single phase, non-directional, over current or Earth fault relay with one measuring element. The relay can be used for feeder protection in all low voltage, medium voltage and high voltage sub-stations.
  • Page 2 AUMSHIVAY ENGINEERING PRIVATE LIMITED  B-21, Bhan Nagar, Queens Road, Jaipur-302021  Website: www.aumshivay.com, www.omengineering.in  E-mail:admin@aumshivay.com TECHNICAL SPECIFICATIONS (FEEDER PROTECTION RELAY-MC12A) Rated Current (In) 1A or 5A Rated Frequency 50Hz ± 2.5 Hz 24V to 110V AC/DC ± 10%...

  • Page 3: Specifications

    AUMSHIVAY ENGINEERING PRIVATE LIMITED  B-21, Bhan Nagar, Queens Road, Jaipur-302021  Website: www.aumshivay.com, www.omengineering.in  E-mail:admin@aumshivay.com Feeder Protection Relay (nX Series); nX Series offer you numerical type 3 phase over current & Earth Fault Relay. Its microcontroller based design offers you to choose from various field selectable IDMT & definite curves.
  • Page 4 AUMSHIVAY ENGINEERING PRIVATE LIMITED  B-21, Bhan Nagar, Queens Road, Jaipur-302021  Website: www.aumshivay.com, www.omengineering.in  E-mail:admin@aumshivay.com GENERATOR PROTECTION RELAY GENERATOR PROTECTION RELAY (MG30 & MG30-I); These are Multifunction Microprocessor Relay for protection of medium/ large synchronous generators. The relay measures the RMS of three-phase currents and voltages and computes the positive and negative sequence components of the Current system.

  • Page 5: Technical Specifications

    AUMSHIVAY ENGINEERING PRIVATE LIMITED  B-21, Bhan Nagar, Queens Road, Jaipur-302021  Website: www.aumshivay.com, www.omengineering.in  E-mail:admin@aumshivay.com Generator Protection Relay (Md-32); Three-phase percentage biased differential protection relay for generators and rotating machines, with stator earth fault or restricted earth fault element. Measurement of the System- frequency differential current with DC offset and harmonic components rejection.
  • Page 6 AUMSHIVAY ENGINEERING PRIVATE LIMITED  B-21, Bhan Nagar, Queens Road, Jaipur-302021  Website: www.aumshivay.com, www.omengineering.in  E-mail:admin@aumshivay.com Generator Protection Relay (SC14S); Relay SC14S is a self-powered, single-phase, non-directional, Earth fault relay with one measuring element. The relay can be used for differential protection of generators, REF applications of generators and transformers in all low voltage, medium voltage and high voltage sub-stations.

  • Page 7: Motor Protection Relay

    AUMSHIVAY ENGINEERING PRIVATE LIMITED  B-21, Bhan Nagar, Queens Road, Jaipur-302021  Website: www.aumshivay.com, www.omengineering.in  E-mail:admin@aumshivay.com MOTOR PROTECTION RELAY Motor Protection Relay; These Motor Protection Relay’s have designed for the protection and active security of medium and large size induction motors. The relay also computes the positive (Id) and negative (Is) sequence components of phase- current system.

  • Page 8: Over-Current

    AUMSHIVAY ENGINEERING PRIVATE LIMITED  B-21, Bhan Nagar, Queens Road, Jaipur-302021  Website: www.aumshivay.com, www.omengineering.in  E-mail:admin@aumshivay.com Under current level: I< = (0.15-1)Im, step 0.01Im No-Load Running Trip time delay: tI< = (0.1-90)s, step 0.1s When current is below 0.1 Im the function is disabled Current setting range: O>...
  • Page 9 AUMSHIVAY ENGINEERING PRIVATE LIMITED  B-21, Bhan Nagar, Queens Road, Jaipur-302021  Website: www.aumshivay.com, www.omengineering.in  E-mail:admin@aumshivay.com Motor Protection Relay (MPR300); These are Microprocessor based Motor protection relay. The relay has got inbuilt CTs for motor sizes up to 50KW (i.e 88 A current). They provide the protection from Thermal Overload, Earth Fault, Single Phasing, Locked Rotor, Under Current.
  • Page 10 AUMSHIVAY ENGINEERING PRIVATE LIMITED  B-21, Bhan Nagar, Queens Road, Jaipur-302021  Website: www.aumshivay.com, www.omengineering.in  E-mail:admin@aumshivay.com TECHNICAL SPECIFICATIONS Protections offered: Thermal over load, Single Phasing, Earth fault, Locked rotor, Under current. *Current setting; 1 to 88 A in 6 different models.
  • Page 11 AUMSHIVAY ENGINEERING PRIVATE LIMITED  B-21, Bhan Nagar, Queens Road, Jaipur-302021  Website: www.aumshivay.com, www.omengineering.in  E-mail:admin@aumshivay.com Motor Protection Relay (MM10); These Relay is a microprocessor based Motor Protection Relay with 4 digits LED Display MM10 is a motor protection relay that combines thermal overload, short circuit, undercurrent, unbalance, phase loss, phase sequence, lock/stall rotor and earth fault protections.
  • Page 12 AUMSHIVAY ENGINEERING PRIVATE LIMITED  B-21, Bhan Nagar, Queens Road, Jaipur-302021  Website: www.aumshivay.com, www.omengineering.in  E-mail:admin@aumshivay.com When the relay is not under tripping condition, pressing "RESET/MODE" will scroll through various settings. Setting Display Function LED showing number or alphabet to indicate which setting is being view as shown in Figure 3.
  • Page 13 AUMSHIVAY ENGINEERING PRIVATE LIMITED  B-21, Bhan Nagar, Queens Road, Jaipur-302021  Website: www.aumshivay.com, www.omengineering.in  E-mail:admin@aumshivay.com TRANSFORMER RELAY Transformer Differntial Relay (MD32TM); These are three-phase percentage biased differential protection relay for 2 winding transformers or 3 winding with only one source of supply. The relay measures the incoming currents and operates the CT ratio and Power Transformer vector group compensation without the need of using interposing CTs.
  • Page 14 AUMSHIVAY ENGINEERING PRIVATE LIMITED  B-21, Bhan Nagar, Queens Road, Jaipur-302021  Website: www.aumshivay.com, www.omengineering.in  E-mail:admin@aumshivay.com Current setting range : d>> = (2 - 20)In, step 0.01In F87T : High-set Phase Detection time: 6ms < t < 20ms Differential Peak current detection with DC offset restraint.
  • Page 15 AUMSHIVAY ENGINEERING PRIVATE LIMITED  B-21, Bhan Nagar, Queens Road, Jaipur-302021  Website: www.aumshivay.com, www.omengineering.in  E-mail:admin@aumshivay.com Transformer Instantaneous Earth Fault Relay (S14S); Relay SC14S is a self-powered, single-phase, non- directional, Earth fault relay with one measuring element. The relay can be used for differential protection of generators, REF applications of generators and transformers in all low voltage, medium voltage and high voltage sub-stations.
  • Page 16 AUMSHIVAY ENGINEERING PRIVATE LIMITED  B-21, Bhan Nagar, Queens Road, Jaipur-302021  Website: www.aumshivay.com, www.omengineering.in  E-mail:admin@aumshivay.com VOLTAGE & FREQUENCY RELAY Voltage & Frequency Relay (MC3V); These are three-phase voltage relay, suitable for protection of HV, MV, LV power transmission and distribution systems. The relay MC3V measures the true R.M.S. value of the 3 phase to neutral voltages fed to three transformers isolated high-impedance inputs.
  • Page 17 AUMSHIVAY ENGINEERING PRIVATE LIMITED  B-21, Bhan Nagar, Queens Road, Jaipur-302021  Website: www.aumshivay.com, www.omengineering.in  E-mail:admin@aumshivay.com Element Instantaneous output : = £ 0.03s Trip time delay : tVo> = (0.05 - 60)s, step 0.01s Function enabling : = Enable - Disable 1-27 (V1<): Positive...
  • Page 18 AUMSHIVAY ENGINEERING PRIVATE LIMITED  B-21, Bhan Nagar, Queens Road, Jaipur-302021  Website: www.aumshivay.com, www.omengineering.in  E-mail:admin@aumshivay.com Voltage & Frequency Relay (MV12); Relay MV12 is a single phase, over voltage or under Voltage relay with one measuring element. The relay can be used for feeder protection in all low voltage, medium voltage and high voltage sub- stations.

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