T e c h n i c a l C a t a l o g u e MCCB. Moulded Case Circuit Breaker

Transcription

1 T e c h n i c a l C a t a l o g u e MCCB Moulded Case Circuit Breaker

2 contents general overview... 2 feature - company profile and certifications... 6 MCCB - NF series circuit breaker, double repulsion breaking method double number of copper contacts, materials of the NF series method of installation, MCCB cross sectional area, positive indication & operation suitability for isolation, compliance with standards selection quick & easy selection table power distribution technical details characteristic curves NF series physical dimensions & mounting holes NF series accessories phase insulation barriers, electrical accessories & shunt trip accessories under voltage device accessories signal switches, rotary handle accessories rotary handle accessories mounting position internal resistance & power loss short circuit table DC voltage selection table motor circuit protection... - selection table motor selection selection table installation safety distance requirement selection table terminal-tightening torque terminal-cable & copper busbar connection data MCBs - BHQ series fixed type BHP series plug-in type BHQ & BHP operating characteristics & dimensions notes... 60

3 g e n e r a l o v e r v i e w NF series The NF series MCCBs are available from AF to 1200AF. Pole sizes from 1 to 4 are available for the various models. All NF series MCCBs are suitable for isolation. AF NF-MA 10kA (2P & 3P) 2 2AF NF2-GP NF2-HA 10kA (3P) 25kA (1P to 4P) ka (1P to 4P) 65kA (3P) NF2-MA NF2-L AF NF-GP NF-HA 10kA (2P & 3P) 25kA (1P to 4P) ka (1P to 4P) 65kA (3P) NF-MA NF-L

4 1200AF NF1200-HA ka (3P & 4P) 400AF NF400-GP NF400-HA NF400-L 25kA (3P & 4P) ka (3P & 4P) 65kA (3P) 600AF & 800AF NF600-GP NF600-HA NF600-L 25kA (3P & 4P) ka (3P & 4P) 65kA (3P) NF800-GP NF800-HA NF800-L 3

5 g e n e r a l o v e r v i e w NF series 37-SDMS-01 NF-MA 37-SDMS-01 NF2-MA 37-SDMS-01 NF400-HA 37-SDMS-01 NF600-HA 37-SDMS-01 NF800-HA 4

6 37-SDMS-02 NF400-HA 37-SDMS-03 NF2-MA MCB: BHQ & BHP series AF BHQ-1 AF BHQ-2 AF BHQ-3 6kA (1P) 6kA (2P) 6kA (3P) AF BHP-1 AF BHP-2 AF BHP-3 6kA (1P) 6kA (2P) 6kA (3P) 5

7 f e a t u r e company profile Since our inception in 1974, our company specializes in manufacturing low voltage circuit breakers and have a reputation of producing products of consistent quality and high reliability. Our manufacturing facilities are certified to the international quality standards of ISO 9001, while our products are certified by ASTA Certification Services UK and SIRIM QAS International. With such high standards, our range of circuit breakers are able to meet your highest demands for quality, safety and reliability. 6

8 SIRIM QAS certification 7

9 f e a t u r e SIRIM QAS certification 8

10 SIRIM QAS certification 9

11 f e a t u r e SASO certification ICS = ICU % 10

12 NF series circuit breakers The demand for economical and high performance circuit breakers is ever increasing in the global market. The NF series circuit breakers provide a simple and reliable solution to meet this global demand where quality, performance and compliance are required. The NF series circuit breakers have been engineered to provide effective protection to low voltage power distribution systems. The NF series is a complete range of MCCB s from 10A to 1200A with 1, 2, 3 and 4 pole versions. An extensive range of electrical accessories is also available. double repulsion breaking method The double repulsion method uses a reverse-loop of current (I) flowing in essentially opposite directions (see figure). This creates a repulsion action and results in a greater opening force (Fm) between the fixed and moving contacts. This force also assists to rapidly extinguish the arc, thereby causing the moving contacts to open faster. A faster breaking time is achieved with this design. moving contacts fixed contact 11

13 f e a t u r e double number of contact coppers For the NF600 and above circuit breakers, double moving contacts are used instead of a single contact. This additional moving contact improves the short circuit breaking performance and reduces contact wear. double moving contacts in NF1200 materials of the NF series 12 The design of the NF series circuit breakers makes it suitable to be used in hot and humid climates. The material used for the circuit breaker casing consists of synthetic resins reinforced with glass fibers. Furthermore, the metal parts used in the breakers are chemically treated to protect against corrosion. The external copper terminals are tin-plated to prevent oxidation.

14 method of installation The NF series circuit breakers can be installed in vertical or horizontal position without any impact on its performance or de-rating of characteristics. horizontal vertical MCCB cross sectional area D C E B F A Parts Index for cross-sectional area of MCCB A MCCB casing made of high-impact BMC material reinforced with glass fibres, providing a safe and strong housing in the event of breaking high-fault currents. B Trip-free mechanism ensuring positive operation and isolation suitability. Designed for long service life and high number of operating cycles. Metal parts in mechanism are chemically treated to withstand harsh tropical weather conditions. C Arc chutes with predefined steel plates arrangement, provide high breaking capabilities. D Fixed and moving contacts utilizing the reverse loop current method, creates a repulsion force thus rapidly extinguishing the arc. E Common trip mechanism to ensure breaking of all poles even when the fault occurs at a particular pole. F Trip release consists of thermal (bi-metal) and magnetic devices suitable for use in AC or DC supply voltages. positive indication & operation The circuit breaker operating handle is designed to indicate the exact position of its moving contacts. Its trip-free operating mechanism cannot indicate that the breaker is ON if the moving contacts are in the OFF position. If the breaker trips due to an electrical fault or overload the handle will be in between the ON and OFF position. This is the TRIP position. To switch the breaker ON after tripping, the handle position must be switched to OFF position first and so to reset the breaker and then switch to the ON position. 13

15 f e a t u r e suitability for isolation In compliance with IEC standard, NF series circuit breaker guarantees no leakage currents and over-voltage withstand between the supply and load terminals when its moving contacts are in the open position. test trip button isolation compliance with standards 14 The NF series circuit breakers have been designed to meet international standards, complying with the following standards: 1. IEC : International Electro 8. SEC Distributors: Saudi Electricity Committee Standard Company, Distribution Materials 2. BSEN : British Standard Specifications Prequalified Manufacturer European Norm 9. SASO: Saudi Standards, Metrology & 3. JIS C : Japan Industrial Standard Quality Organization 4. GB : China Standard 10. Housing & Development Board, Singapore 5. CNS : Taiwan Standard 11. Ministry of Electricity & Water, Kingdom 6. CE: Conformity European of Bahrain 7. SIRIM: Malaysia 12. Jabatan Perkhidmatan Elektrik Kementerian Pembangunan, Negara Brunei Darussalam

16 selection quick & easy table Rated Current In (A) 10 Interrupting Capacity Icu (ka) Sym at 415 Vac NF-MA NF-GP NF-MA NF-HA NF-L NF-GP NF2-GP NF2-MA NF2-HA NF2-L NF400-GP NF400-HA NF400-L NF600-GP NF600-HA NF600-L NF800-GP NF800-HA NF800-L NF1200-HA 15

17 p o w e r d i s t r i b u t i o n technical details electrical characteristics model Code NF NF NF2 Ampere Frame (AF) AF AF 2AF Rated Current: In (A) at Ambient Temp C Number of Poles Available Rated Insulation Voltage: U i(v) Rated Impulse withstand Voltage: U imp (kv) Rated Ultimate Short Circuit Breaking Capacity: I cu (ka) MA GP MA HA L GP MA HA L 690V V V IEC V V V V DC 2V Rated Service Short Circuit Breaking Capacity: I cs = % I cu Rated Short Circuit Breaking Capacity: (ka) 600V JIS C (sym) 440V 380V V DC 2V Suitable for Isolation Utilization Category A A A A A A A A A Pollution Degree No. of Electrical Operations Notes: - denotes available.

18 technical details electrical characteristics model Code NF400 NF600 & NF800 NF1200 Ampere Frame (AF) 400AF 800AF 1200AF Rated Current: In (A) at Ambient Temp C & Number of Poles Available Rated Insulation Voltage: U i(v) Rated Impulse withstand Voltage: U imp (kv) Rated Ultimate Short Circuit Breaking Capacity: I cu (ka) GP HA L GP HA L HA 690V V V IEC V V V V DC 2V Rated Service Short Circuit Breaking Capacity: I cs = % I cu Rated Short Circuit Breaking Capacity: (ka) 600V JIS C (sym) 440V 380V V DC 2V Suitable for Isolation 17 Utilization Category A A A A A A A Pollution Degree No. of Electrical Operations Notes: - denotes available.

19 p o w e r d i s t r i b u t i o n technical details electrical characteristics model Code NF-MA NF2-MA 37-SDMS-01 NF400-HA NF600-HA Ampere Frame (AF) AF 2AF 400AF 600AF Rated Current: In (A) at Ambient Temp 55 C Number of Poles Available Rated Insulation Voltage: U i(v) Rated Impulse withstand Voltage: U imp (kv) Rated Ultimate Short Circuit Breaking Capacity: I cu (ka) IEC V V V Rated Service Short Circuit Breaking Capacity: I cs = % I cu Suitable for Isolation Utilization Category A A A A Pollution Degree No. of Electrical Operations Notes: - denotes available. 18

20 technical details electrical characteristics model Code 37-SDMS SDMS SDMS-02 NF800-HA NF2-MA NF400-HA Ampere Frame (AF) 800AF 2AF 400AF Rated Current: In (A) at Ambient Temp 55 C Number of Poles Available Rated Insulation Voltage: U i (V) Rated Impulse withstand Voltage: U imp (kv) Rated Ultimate Short Circuit Breaking Capacity: I cu (ka) IEC V V V Rated Service Short Circuit Breaking Capacity: I cs = % I cu Suitable for Isolation Utilization Category A A A Pollution Degree No. of Electrical Operations Notes: - denotes available. 19

21 p o w e r d i s t r i b u t i o n technical details mechanical characteristics & accessories Width Length Depth Accessories a aa b * ^ bbb bb c ca model Code CL ON LOCKED OFF aa a UNLOCKED bb Without Terminal Cover b (mm) c ca Type of Terminals No of Mechanical Operations Weight (kg) Operating Handle Lock Terminal Covers Mounting Screws Phase Barrier Cable Lug Terminal Shrouds 37-SDMS-01 NF-MA NF2-MA NF400-HA stirrup stirrup saddle NF600-HA saddle Width Length Depth Accessories a aa b * ^ bbb bb c ca model Code CL ON aa a UNLOCKED LOCKED OFF bb Without Terminal Cover b (mm) c ca Type of Terminals No of Mechanical Operations Weight (kg) Operating Handle Lock Terminal Covers Mounting Screws Phase Barrier Cable Lug Terminal Shrouds 37-SDMS SDMS SDMS-02 NF800-HA saddle saddle NF2-MA stirrup - NF400-HA * without Terminal Cover; ^ with Terminal Cover. Notes: - denotes available.

22 technical details thermomagnetic trip release model Code NF NF NF2 Ampere Frame (AF) Rated Ultimate Short Circuit Breaking Capacity: I cu (ka) Fixed thermal, Fixed Magnetic 10 x Ith Fixed thermal, Adjustable Magnetic AF MA AF 2AF GP MA HA L GP MA HA L mechanical characteristics Number of Poles (P) a b c (80) (80) 68 ca (102) (104) 92 bb aa Type of Terminals M5 clamp terminal screw M8 screw M8 screw No of Mechanical Operations Weight (kg) (1.2) (1.6) 1.9 accessories Shunt Trip Device Under Voltage Trip Device Auxiliary Switch Alarm Switch Auxiliary + Alarm Switch 21 Rotary Handle Notes: All L-type breakers are only available in the 3-pole version; ( ) denotes for L-type. - denotes available; however, all accessories are not available for 1-pole models.

23 p o w e r d i s t r i b u t i o n technical details thermomagnetic trip release model Code NF400 NF600 & NF800 NF1200 Ampere Frame (AF) Rated Ultimate Short Circuit Breaking Capacity: I imp (ka) Fixed thermal, Fixed Magnetic 10 x Ith Fixed thermal, Adjustable Magnetic 400AF GP HA L 800AF 1200AF GP HA L HA mechanical characteristics Number of Poles (P) a b c ca bb aa Type of Terminals M12 Bolt M12 Bolt M12 Bolt No of Mechanical Operations Weight (kg) 5.5(6.0) (11) accessories Shunt Trip Device Under Voltage Trip Device Auxiliary Switch Alarm Switch 22 Auxiliary + Alarm Switch Rotary Handle Notes: All L-type breakers are only available in the 3-pole version; ( ) denotes for L-type. - denotes available.

24 c h a r a c t e r i s t i c s NF-MA characteristic curves tripping curve temperature characteristic ~A Rated ambient A~30A NF-GP, MA & HA characteristic curves tripping curve temperature characteristic Instantaneous trip 23

25 c h a r a c t e r i s t i c s NF2-GP, MA & HA tripping curve characteristic curves temperature characteristic 130 Current rating (%) Rated ambient 80 Rated ambient C Ambient temperature ( C) NF400-GP & HA tripping curve characteristic curves temperature characteristic 24

26 NF600/800-GP & HA tripping curve characteristic curves temperature characteristic Frame size: 800AF NF600 NF800 NF1200-HA tripping curve characteristic curves temperature characteristic 25

27 c h a r a c t e r i s t i c s NF-L characteristic curves tripping curve NF2-L characteristic curves tripping curve 26

28 NF400-L characteristic curves tripping curve NF600/800-L characteristic curves tripping curve 27

29 p h y s i c a l d i m e n s i o n s & m o u n t i n g h o l e s NF-MA front connection 2-pole 3-pole 28 2-pole 3-pole

30 NF-GP, MA & HA front connection 4-pole 2-pole 3-pole 2-pole 3-pole 4-pole 29

31 p h y s i c a l d i m e n s i o n s & m o u n t i n g h o l e s NF2-GP, MA & HA front connection 4-pole 3-pole 30 3-pole 4-pole

32 NF400-GP & HA front connection 4-pole 3-pole 3-pole 4-pole 31

33 p h y s i c a l d i m e n s i o n s & m o u n t i n g h o l e s NF600/800-GP & HA front connection 4-pole 3-pole 32 3-pole 4-pole

34 NF1200-HA front connection Insulation barrier (removable) Insulation barrier (removable) Bolt M12x 115 Mounting hold Mounting hold Conductor N Neutral Pole Pole 3 Pole R M8 Screw or 10mm 33 3-pole 4-pole

35 p h y s i c a l d i m e n s i o n s & m o u n t i n g h o l e s NF-L front connection 3-pole 3-pole NF2-L front connection 3-pole 3-pole 34

36 NF400-L front connection 3-pole 3-pole NF600/800-L front connection 3-pole 3-pole 35

37 p h y s i c a l d i m e n s i o n s & m o u n t i n g h o l e s 37-SDMS-01 NF-MA front connection Breaker ON UNLOCKED OFF 22 LOCKED Ø 8.5 Ø M4x0.7 thread or 5 mm-dia. hold 37-SDMS-01 NF2-MA front connection 24.5 Breaker ON UNLOCKED 200 LOCKED OFF Ø 7 Ø M4x0.7 thread or 5 mm dia. hold 36

38 37-SDMS-01 NF400-HA front connection Breaker ounting hold ON UNLOCKED OFF 400 LOCKED M20 Socket Set Screw 194 OFF Ø Ø 7 M10 Hex. head Screw M6 Screw 7mm dia SDMS-01 NF600-HA front connection 210mm (Max.) Breaker ON OFF 630 OFF UNLOCKED LOCKED (Max. without cover) 102 Ø 4 15± Ø Ø mm (Max.) t 0A: t= 6 m/m 630A: t= 8 m/m 800A: t= 12 m/m 70 M6 Screw or 7mm dia. hol 37

39 p h y s i c a l d i m e n s i o n s & m o u n t i n g h o l e s 37-SDMS-01 NF800-HA front connection 210mm (Max.) Breaker ON OFF 800 OFF UNLOCKED LOCKED (Max. without cover) ± Ø 4 Ø 8 Ø mm (Max.) t 0A: t= 6 m/m 630A: t= 8 m/m 800A: t= 12 m/m 70 M6 Screw or 7mm dia. hol 38

40 37-SDMS-02 NF400-HA front connection Phase Barrier Terminal Shroud Breaker Mounting hold ON OFF Terminal Shroud 194 OFF 47 Ø 12.5 Ø 7 M10 Hex. head screw M6 Screw or 7mm dia. hold 37-SDMS-03 NF2-MA front connection Phase Barrier Terminal Shroud M8 Hex. socket head screw 24.5 Breaker Terminal Shroud ON OFF Ø 7 Ø 4.5 M8 Hex. socket head screw M4x0.7 or 5 mm 39

41 a c c e s s o r i e s phase insulation barriers Inter phase barriers are provided as standard. The use of the inter phase barriers is necessary to increase the clearance distances between phases to prevent electrical faults during the operation of the circuit breaker. Model NF NF NF2 a b NF NF a dimensions of phase barrier insulators in mm NF NF top b electrical accessories & shunt trip All electrical accessories supplied for the breaker are prewired. Accessories such as Shunt Trip, Under Voltage Trip, Alarm Switch, Auxiliary Switch and combination Alarm and Auxiliary Switch can be fitted into the breaker accessory compartments. Please refer to the table in page 31 for the accessories installation guide. Shunt Trip Device The Shunt Trip device opens the circuit breaker by means of an electrical signal. Voltages between 70% and 110% of the coil voltage rating will operate the shunt trip device. 40 All Shunt Trip devices are factory fitted with a cut-off supply switch.

42 / 60 Hz Coil Power Consumption (VA) Coil Voltage NF NF NF2 NF400 NF600 NF800 NF1200 AC (V) AC - 4 (200V) AC (330V) AC (4V) AC DC Trip Time (ms) < 15 < 15 < 15 8 to 15 8 to 15 8 to 15 8 to 15 Note: Other voltages can be supplied on demand. under voltage trip device The Under Voltage Trip device will open the circuit breaker contacts when the supply voltage to the coil drops below 70% of its voltage rating. After tripping, the circuit breaker can be closed manually again when the supply voltage is 85% of its coil voltage rating or more. The Under Voltage Trip device is always energized during normal conditions when supply voltage is healthy. Model AC Coil Voltage Consump (VA) Trip Time (ms) NF2 & below < NF to 30 NF to 30 NF to 35

43 a c c e s s o r i e s signaling switches The Signaling switches allow the breaker status information to be obtained remotely. The signaling switch consists of several dry contacts with both normally open (N.O.) and normally closed (N.C.) positions. Auxiliary Switch - Provides breaker ON and OFF status information. Auxiliary Switch Alarm Switch - Provides breaker TRIP status information. Auxiliary + Alarm Switch - Provides breaker ON, OFF and TRIP status information. Alarm Switch Please refer to the above circuit diagram for the switch terminal codes in order to obtain different contact positions, such as N.O. and N.C. to suit the application. rotary handle mechanism The breaker mounted rotary handle mechanism allows the user to easily switch the breaker ON by a rotating action. The rotary handle mechanism is equipped with a safety device that prevents the panel door from being open when the breaker is in ON position. A bypass screw is provided for manual intervention when breaker is in ON position. 42 Pad locking facility is available on the rotary handle. The handle can be pad locked when the breaker is in OFF position.

44 rotary handle external dimensions Figure (a) Figure (b) rotary handle drilling plan Figure (c) Figure (d) Figure (e) Type Breaker Type No of Pole Figure External Dimensions Drilling Plan Dimensions (mm) A B C D Mounting Screws AC-NF-RHN0 AC-NF-RHN1 AC-NF-RHN2 NF-MA NF-GP MA HA NF-L EG-MA HA NF2-GP MA HA NF2-L EG2-MA HA 3P 3P 4P 3P 4P a c e (116) 126 (145) M4 x 0.7 screw or ø 5 (X) breakers mounting screws (2pcs) (Y) operating handle mounting screws (2pcs) AC-NF-RHN3 AC-NF-RHN4 NF400-GP HA L NF600-GP HA L NF800-GP HA L NF1200-HA 3P 4P 3P 4P b d e M6 screw or ø 7 (X) (Y) breakers mounting screws (4pcs) 43 Note All rotary handles are supplied with M4 x 0.7 screws and self-tapping ø 5mm screws.

45 a c c e s s o r i e s rotary handle appearance A direct rotating operating handle has a standard safety device which prevents the breaker from closing as long as the cover is open. It indicates the tripping of the breaker even in ON-lock position, but only in cases when a single padlock (35mm) is used. The degree of protection, in accordance with IEC529, is IP3X (or IP5X with provision of dustproof packing). The use of the rotary handle mechanism increases the IP rating of the breaker Type AC-NF-RHN0 to AC-NF-RHN2 AC-NF-RHN3 to AC-NF-RHN4 Left hinge H 0 or more 0 or more Center of hinge & Breaker Left hinge X1 (5H + ) or more (8H + ) or more Right hinge H Less than or more Right hinge X2 170 or more (5H + 120) or more 0 or more (4H + 70) or more The figure above shows the relationship between the hinge and breaker viewed from the load side of the breaker. 44

46 mounting position internal accessory MCCB models Accessories NF MA NF GP MA HA L NF2 GP MA HA L NF400 GP HA L NF600/800 GP HA L NF1200 HA Shunt Trip Coil (STC) R1 & 2 R1 & 2 R1 & 2 R1 & 2 R1 & 2 Under Voltage Trip (UVT) R1 & 2 R1 & 2 R1 & 2 R1 & 2 R1 & 2 Auxiliary Switch (AUS) L1 & L2 L1 & L2 L1, L2 L1, L2, L3 L1, L2, L3 Alarm Switch (ALS) L1 & L2 L1 & L2 L1, L2 L1, L2, L3 L1, L2, L3 Auxiliary + Alarm Switch (AAS) L1 & L2 L1 & L2 L1, L2 L1, L2, L3 L1, L2, L3 Notes 1) It is NOT possible to install both UVT and STC in the same MCCB. 2) For NF600 onwards, it is possible to install up to a maximum of 4 Auxiliary. Switches or 2 Alarm switches. 3) UVT requires a voltage module that is installed on the right side lead wire terminal. right side Accessory compartment slot markings left side L = Left compartment; R = Right Compartment 45

47 r e s i s t a n c e & p o w e r t a b l e internal resistance & power loss Type NF-MA NF-GP NF-MA NF2-GP NF2-MA NF400-GP NF600-GP NF800-GP In A Resistance uω Loss W Resistance uω Loss W Resistance uω Loss W Resistance uω Loss W Resistance uω Loss W Resistance uω Loss W Resistance uω Loss W Resistance uω Loss W 10A A 20A 30A 40A A A A A A A A A A A A A 300A 3A 400A A A A 800A

48 internal resistance & power loss Type NF-HA NF2-HA NF400-HA NF600-HA NF800-HA NF1200-HA In A Resistance uω Loss W Resistance uω Loss W Resistance uω Loss W Resistance uω Loss W Resistance uω Loss W Resistance uω Loss W 10A A A A A A A A 80A A A 1A 160A 175A 200A 225A A 300A 3A 400A A 600A A 800A A 1200A

49 r e s i s t a n c e & p o w e r t a b l e internal resistance & power loss Type NF-L NF2-L NF400-L NF600-L NF800-L In A Resistance uω Loss W Resistance uω Loss W Resistance uω Loss W Resistance uω Loss W Resistance uω Loss W 10A A A A A A A A 80A A A 1A 160A 175A 200A 225A A 300A 3A 400A A 600A A 800A

50 d c s h o r t c i r c u i t t a b l e DC voltage time constant 10ms or below Model Pole 48V Icu/Ics 125V Icu/Ics 2V Icu/Ics 400V Icu/Ics 5V Icu/Ics 600V Icu/Ics NF-MA / / / 8 15 / / / 4 6 / 3 NF-GP / / / / 8 15 / 8 15 / / / / 7 6 / 3 NF-MA / 25 / 25 / 25 / / / / / / 8 15 / 8 15 / 8 15 / 8 10 / 5 10 / 5 8 / 4 8 / 4 NF-HA / / / / 80 / / / / / / / / / / / 9 18 / 9 NF-L 3 1 / 75 / / / 18 NF2-GP / / / / 8 15 / 8 15 / / / / 4 6 / 3 NF2-MA / 25 / 25 / 25 / / / / / / 8 15 / 8 15 / 8 15 / 8 10 / 5 10 / 5 8 / 4 8 / 4 NF2-HA / / / / 80 / / / / / / / / / / / 9 18 / 9 NF2-L 3 1 / 75 / / / 18 NF400-GP / / / / / / / 8 13 / 8 10 / 5 10 / 5 NF400-HA 3 4 / / 80 / / / / / / / 9 18 / 9 NF400-L 3 1 / 75 / / / 18 NF600 / NF800-GP / / / / / / / 8 13 / 8 10 / 5 10 / 5 NF600 / NF800-HA 3 4 / / 80 / / / / / / / 9 18 / 9 49 NF800-L 3 1 / 75 / / / 18 NF1200-HA 3 4 / / 80 / / / / / / / 9 18 / 9

51 s e l e c t i o n t a b l e motor circuit protection 3-phase motor 400V 440V / 60Hz Motor Capacity [kw at 400/440] Motor Full-load Current [A] MCCB In [A] 10 Interrupting Capacity Icu (ka) Sym NF-MA NF-MA NF-HA NF-L NF-GP NF2-GP NF2-MA NF2-HA NF2-L NF400-GP NF400-HA NF400-L NF600-GP NF600-HA NF800-GP NF800-HA NF800-L

52 Short Circuit protection of electric motors The NF series circuit breakers are suitable to combine with motor starters. As defined in IEC standards, the starter switching device, usually a magnetic contactor, must be coordinated with the equipment capable of providing short circuit protection for circuit wiring/cables. The common starting methods for asynchronous squirrel-cage induction motors which the NF series can be used in combination are the direct-online-starters and star-delta-starters. The following selection tables, illustrating the above, shows the suitable breaker ratings that can accommodate motor starting currents. When more than one motor is connected to a branch circuit, the sum of the motor rated current equals to the rated current of the breaker. motor selection direct-online-starter Motor Ratings kw HP 1/4 1/2 3/ Motor Full-Load Current (A) ø 220V Rated Current (A) Wire Size (mm 2 ) Motor Full-Load Current (A) ø 380V Rated Current (A) Wire Size (mm 2 ) Motor Full-Load Current (A) ø 415V Rated Current (A) Wire Size (mm 2 ) Motor Ratings kw HP Motor Full-Load Current (A) ø 220V Rated Current (A) Wire Size (mm 2 ) Motor Full-Load Current (A) ø 380V Rated Current (A) Wire Size (mm 2 ) Motor Full-Load Current (A) ø 415V Rated Current (A) Wire Size (mm 2 ) Please note that the breaker selection shown in the tables are subjected to the following: only 1 motor to be installed in the circuit and the starting current is less than 6 times of motor full load current.

53 s e l e c t i o n t a b l e motor selection direct-online-starter Motor Ratings kw HP Motor Full-Load Current (A) ø 220V Rated Current (A) Wire Size (mm 2 ) Motor Full-Load Current (A) ø 380V Rated Current (A) Wire Size (mm 2 ) Motor Full-Load Current (A) ø 415V Rated Current (A) Wire Size (mm 2 ) motor selection star-delta-starter Motor Ratings kw HP Motor Full-Load Current (A) ø 220V Rated Current (A) Wire Size (mm 2 ) Motor Full-Load Current (A) ø 380V Rated Current (A) Wire Size (mm 2 ) Motor Full-Load Current (A) ø 415V Rated Current (A) Wire Size (mm 2 ) Please note that the breaker selection shown in the tables are subjected to the following: only 1 motor to be installed in the circuit and the starting current is less than 6 times of motor full load current.

54 motor selection star-delta-starter Motor Ratings kw 90 HP Motor Full-Load Current (A) ø 220V Rated Current (A) Wire Size (mm 2 ) Motor Full-Load Current (A) ø 380V Rated Current (A) Wire Size (mm 2 ) Motor Full-Load Current (A) ø 415V Rated Current (A) Wire Size (mm 2 ) Please note that the breaker selection shown in the tables are subjected to the following: only 1 motor to be installed in the circuit and the starting current is less than 6 times of motor full load current. installation Model NF NF-2 NF NF Operating Voltage U<440V U<600V U<440V U<600V U<440V U<600V U<440V U<600V safety distance requirements Insulation, Insulated Bars or Painted Sheetmetal (mm) A B1 B Bare/Unpainted Sheetmetal (mm) A B1 B

55 s e l e c t i o n t a b l e terminal-tightening torque To ensure the correct operation of the MCCB, it is essential to make a proper cable or busbar termination to the MCCB. It is recommended that the supplied screws be used to connect the cables or busbars to the breaker terminals and tightened to the torque, as shown in the table below. terminals for cable lugs connection Cable size mm 2 tightening range* Nm Bolt/Screw Screw Model Min Max I II Size Type NF 1.6 ø ~ 2.0 N/A M5 screw Pan head NF 1.6 ø 2.5 ~ 3.5 N/A M8 screw Screw NF ~ 3.5 N/A M8 screw Screw NF x N/A 10 ~ 14 M12 bolt x 2 Bolts NF600 2 x 1 2 x 200 N/A 10 ~ 14 M12 bolt x 2 Bolts NF800 N/A N/A N/A N/A N/A N/A NF1200 N/A N/A N/A N/A N/A N/A terminals for copper busbar connection Copper busbar size mm 2 tightening range* kgf-cm Bolt/Screw Model Max t = Max w = I II Size NF ~ 2.0 N/A M5 screw NF ~ 3.5 N/A M8 screw NF ~ 3.5 N/A M8 screw NF N/A 10 ~ 14 M12 bolt x 2 NF N/A 10 ~ 14 M12 bolt x 2 NF N/A 10 ~ 14 M12 bolt x 2 54 NF1200 * Note Copper busbar N/A 10 ~ 14 Caution 1) Do not over tighten. If the tightening torque is exceeded, bolts/screws and copper bars may be damaged. 2) Failure to secure a terminal connection may cause an electrical fault. Make sure all terminal connections are tightly secured. M12 bolt x 2

56 c o n n e c t i o n d a t a terminal-cable & copper busbar sizes MCCB Rated Current In (A) ISO Square (mm 2 ) CNS Standard Square (mm 2 ) UL Standard AWG or kcmil at 75 C 8 In > ø 14 AWG 12 In > ø 14 AWG 15 In > ø 14 AWG 20 In > ø 12 AWG 25 In > AWG 32 In > AWG In > AWG 65 In > AWG 85 In > AWG In > AWG 115 In > 35 2 AWG 130 In > AWG 1 In > /0 AWG 175 In > /0 AWG 200 In > /0 AWG 225 In > /0 AWG 2 In > MCM 275 In > MCM 300 In > MCM 3 In > MCM 400 In > x 2 x 3/0 AWG 0 In > x 1 2 x 1 2 x 2 MCM 630 In > 0 2 x x x 3 MCM 800 In > x x 2 3 x 300 MCM 0 In > x (30 x 5) 2 x (30 x 5) 2 x 2 MCM In > 0 2 x (40 x 5) 2 x (40 x 5) 2 x 3 MCM 800 In > x ( x 5) 2 x ( x 5) 3 x 300 MCM

57 M C B BHQ series fixed type Ampere Frame (AF) Model Code BHQ-1 BHQ-2 BHQ-3 Number of Pole (P) Rated Voltage: Ue Vac Rated Current: In (A) at Ambient Temperature: C 240 / / / Rated Ultimate Short Circuit Breaking Capacity: I cu (ka) IEC V/415V 6 / 6 6 / 6 6 / 6 a b Weight c ca bb aa kg

58 BHP series plug-in type Ampere Frame (AF) Model Code BHP-1 BHP-2 BHP-3 Number of Pole (P) Rated Voltage: Ue Vac Rated Current: In (A) at Ambient Temperature: C 240 / / / Rated Ultimate Short Circuit Breaking Capacity: I cu (ka) IEC V/415V 6 / 6 6 / 6 6 / 6 a a aa ca c b c b Weight ca bb aa kg

59 M C B c h a r a c t e r i s t i c s & d i m e n s i o n s BHQ & BHP series operating characteristics BHQ & BHP series temperature characteristics 58

60 BHQ series fixed type front connection 1-pole 2-pole 3-pole BHP series plug-in type front connection 59 1-pole 2-pole 3-pole

61 60 N O T E S

62 what is quality? We define quality as products having the highest level of reliability, performance and design. Our aim for quality is to meet the requirements of other global markets and to exceed the current international standards. With our in-house design and development team, our range of products are currently manufactured in accordance and compliance to various international standards. our road to quality Manufacturer Hwa Shih Electric Industrial Co Ltd 14, 16 Lane 2, Pa Teh Road, Yinko District, New Taipei City, Taiwan R.O.C. Tel : Fax : hwashih@ms61.hinet.net