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EKF VA-99M Technical Manual

Molded case circuit breakers
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TECHNICAL MANUAL
Molded case circuit
breakers VА-99М EKF

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Summary of Contents for EKF VA-99M EKF

  • Page 1 TECHNICAL MANUAL Molded case circuit breakers VА-99М EKF...

  • Page 2: Design And Operating Principle

    1 DESCRIPTION The molded case circuit breaker VA-99M EKF is designed for infrequent routine close/open operations and overload/short-circuit protection to be used in electrical installations for residential and civil engineering, industrial facilities, power substations, electrical distribution points, panel electrical equipment at rated operating voltage up to 400 V AC at 50 Hz under currents from 16 to 1600 Amps.

  • Page 3: Internal Arrangement

    contact sides, i.e. connection is possible from the top and bottom of the circuit breaker. WARNING! The operating handle of the molded case circuit breaker has three positions "ON", "OFF" and "TRIP". To switch on the MCCB after tripping, move the operating handle from the intermediate position to the "OFF"...
  • Page 4 Main technical data are given in tables 1-5. Table 1 - Technical data of VА-99М 63, VА-99М 100, VА-99М 250 Values Parameters VА-99М 63 VА-99М 100 VА-99М 250 АС АС АС АС АС Rated operating voltage Ue, V 400 V 250 V 400 V 690 V...
  • Page 5 Table 1 continued Values Parameters VА-99М 63 VА-99М 100 VА-99М 250 Power consumption, W Protection degree IP30 Operating from – 25 to + 40 temperature, °C Weight, kg 1,25 Min. service life, years Table 2 - Technical data of VA-99М 400, VА-99М 630, VА-99М 800 Values Parameters VА-99М...
  • Page 6 8,25 24,6 Min. service life, years * Motor mechanism 230V AC VA-99M 800 EKF (mccb99m-a-135) shall not be used with molded case circuit breaker VA-99M 800/1000A 3P 50kА EKF (mccb99-800-1000 m). Table 3 - Technical data of VA-99M 1250, VA-99M 1600...
  • Page 7 Table 3 continued Values Parameters VА-99М 1250 VА-99М 1600 АС АС АС АС Rated operating voltage Ue, V 400 V 690 V 400 V 690 V Min. mechanical endurance, O-C cycles 2500 2500 Min. electrical endurance, O-C cycles 1500 Rated peak short-circuit current Icm, kA 2,2хIcu Rated insulation voltage Ui, V Utilization category according...
  • Page 8 Table 4 - Technical data of VA-99M with electronic trip unit Values Parameters VA-99М VА-99М VА-99М VА-99М VА-99М VА-99М VА-99М 100/63А 100/100А 250/250А 400/400А 630/630А 800/800А 1250/1250А Rated 1250 current In, А Rated insulation voltage Ui, V Rated impulse voltage, Uimp, kV Rated operating...
  • Page 9 Table 4 continued Values Parameters VA-99М VА-99М VА-99М VА-99М VА-99М VА-99М VА-99М 100/63А 100/100А 250/250А 400/400А 630/630А 800/800А 1250/1250А Min. mechanical 8500 8500 7000 4000 4000 2500 2500 endurance, O-C cycles Min. electrical endurance, 1500 1500 1000 1000 1000 O-C cycles Number of 3Р...
  • Page 10 Description of the electronic trip unit for VA-99M 0.65 0.55 sd ( IR (A) - Set point of overload protection tripping, A. Setting values for each dimension are shown in Table 4. Kt1 (s) - Time delay of overload current tripping for current 2Ir1, s. Possible setting is 12-100 s.
  • Page 11 Table 5.2 - Ktsd Settings ≤0.9 Isd no action Isd~1.1Isd Action Take action >1.1Isd action during Encoder settings 0.06 tsd (s) Fixed time I>1.5Isd ≥1.1 Isd 0.06 characteristics & I<Ii (without protec- Error ±0.02 ±0.03 ±0.04 ±0.06 tion) (1.5I I>Isd ≥1.1 Isd Reverse time &...
  • Page 12 Table 6 continued Values VА-99М 100 VА-99М 250 VА-99М 400 VА-99М 800 Parameters АС АС АС АС АС АС АС АС 250 V 400 V 690 V 250 V 400 V 690 V 400 V 690 V 400 V 690 V Rated peak short-circuit 2,1xIcu...

  • Page 13: Tripping Characteristics

    TRIPPING CHARACTERISTICS Tripping Tripping curve of VA-99M 63 characteristics of the molded case circuit 10000 breakers VA-99M. In the diagrams, areas 5000 1, 2, 3 have meaning: 2000 1 - "cold" tripping area 1000 of thermal trip unit; 2 - "hot" tripping area of thermal trip unit;...
  • Page 14 Tripping curve of VA-99M 100 10000 5000 2000 1000 0.05 0.02 0.01 0.001 10 12 20 30 I/Inom 1.05 Rated current ratio Кратность номинального тока Table 7.2 - Values to test VA-99M 100 thermal trip units Test current, А Tripping time, s Result 2*In ≤...
  • Page 15 Tripping curve of VA-99M 250 10000 5000 2000 1000 0.05 0.02 0.01 0.001 10 12 20 30 I/Inom 1.05 Rated current ratio Кратность номинального тока Table 7.3 - Values to test VA-99M 250 thermal trip units Test current, А Tripping time, s Result 2*In ≤...
  • Page 16 Tripping curve of VA-99M 400 10000 5000 2000 1000 0.05 0.02 0.01 0.001 10 12 20 30 I/Inom 1.05 Rated current ratio Кратность номинального тока Table 7.4 - Values to test VA-99M 400 thermal trip units Test current, А Tripping time, s Result 2*In ≤...
  • Page 17 Tripping curve of VA-99M 630 10000 5000 2000 1000 0.05 0.02 0.01 0.001 10 12 20 30 I/Inom 1.05 Rated current ratio Кратность номинального тока Table 7.5 - Values to test VA-99M 630 thermal trip units Test current, А Tripping time, s Result 2*In ≤...
  • Page 18 Tripping curve of VA-99M 800 (1600) 10000 5000 2000 1000 0.05 0.02 0.01 0.001 10 12 20 30 I/Inom 1.05 Кратность номинального тока Rated current ratio Table 7.6 - Values to test VA-99M 800 (1600) thermal trip units Test current, А Tripping time, s Result 2*In...
  • Page 19 INFLUENCE OF THE AMBIENT TEMPERATURE The devices shall be commissioned at normal operating ambient temperature. The tripping time of the molded case circuit breaker is determined by its tripping curve. The setting value of the overload protection (Ir) shall be adjusted according to the diagrams below.
  • Page 20 VА-99М 630 VА-99М 800 (1600) С С TRIPPING CURVE FOR VA-99M WITH ELECTRONIC TRIP UNIT 4 ч 2 ч 1 ч 30 мин 20 мин 14 мин 10 мин 150sec Long-term 6 мин 110sec overload 80sec 4 мин t1 20% 60sec (12–150) sec 2 мин...

  • Page 21: Overall And Installation Dimensions

    4 OVERALL AND INSTALLATION DIMENSIONS Phase barrier Phase barrier Name Dimentions VА-99М 63 VА-99М 100 VА-99М 250 VА-99М 400 VА-99М 630 Overall dimensions, Installation dimensions, Ø D Ø D1...
  • Page 22 21,8 10,5 Overall and installation dimensions of VA-99M 800-1000A* * Motor mechanism 230V AC VA-99M 800 EKF (mccb99m-a-135) shall not be used with the molded case circuit breaker VA-99M 800/1000A 3P 50kA EKF (mccb99-800-1000m).
  • Page 23 2 – 2 – 4 – Overall and installation dimensions of VА-99М 1250А 12 – 4 – 4 – 4 – 1600 137 ± 0.8 ± 0.37 152 ± 0.85 101 ± 3.15 280± 0.405 Overall and installation dimensions of VА-99М 1600А...
  • Page 24 Overall and installation dimensions of VА-99М 100, VА-99М 250, VА-99М 400, VА-99М 630-800 with electronic trip unit Name Dimensions VА-99М 100 VА-99М 250 VА-99М 400 VА-99М 630-800 with electronic trip unit 88,6 17,6 106,5 115,5 146,5 28,5 45,3 Overall dimensions, 132,5 220,5 Installation...

  • Page 25: Delivery Scope

    LINE LOAD 21,8 2 – 6 – Overall and installation dimensions of VА-99М 1250 with electronic trip unit 5 DELIVERY SCOPE Molded case circuit breakers VА-99М are supplied in one individual package. For all available documentation, scan the QR-code on the insert or on the inside of the package.
  • Page 26 6 INSTALLATION, CONNECTION AND OPERATION 6.1. Storage and operation conditions The molded case circuit breakers VA-99M shall be stored in the original package indoors with natural ventilation at ambient air temperature from -60 to +55°С and relative humidity up to 80% at +25°С. The molded case circuit breakers can be operated at temperatures between -25°C and +40°C.

  • Page 27: Safety Requirements

    6.3 Installation of accessories Accessories for the molded case circuit breaker VA-99M with thermomagnetic trip unit shall not be installed to the molded case circuit breaker VA-99M with electronic trip unit, and accessories for the molded case circuit breaker VA-99M with electronic trip unit shall not be installed to the molded case circuit breaker VA-99M with thermomagnetic trip unit.

  • Page 28: Manufacturer's Warranty

    To dispose of the product, send it to an authorized company for recycling in com- pliance with the national and local laws and regulations in force. 11 CERTIFICATE OF ACCEPTANCE The molded case circuit breaker VA-99M EKF has been approved for operation. Date of manufacture: for information, refer to the product package.

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