Control Circuit Fusing Instructions

IMPORTANT: Select the fuse to protect the control circuit conductors in accordance with the National Electrical Code and Canadian Electrical Code.

Primary Fuse Sizing Chart - Refer to NEC and CEC Requirements (When only Primary Protection is used.) Maximum Ampere Rating for Current Limiting Class CC Fuses based on Transformer Primary Voltage Transformer VA Rating 208 V 220V 240 V 277 V 347 V 380 V 400 V 415 V 440 V 480 V 500 V 550 V 600 V 690 V 63 VA .75.75.75.5.5.4.4.4.4.25.25.25.25.25 80 VA 1 1 1.75.5.5.5.5.5.5.4.4.4.25 130 VA 1.5 1.5 1.5 1.25 1 1 .75 .75 .75 .75 .75 .5 .5 .5 200 VA 2.5 2.5 2.5 2 1.5 1.5 1.5 1.25 1.25 1.25 1 1 1 .75 250 VA 3 3 3 2.5 2 1.5 1.5 1.5 1.5 1.5 1.5 1.25 1.25 1 350 VA 544332.52.52.52221.51.51.5 500 VA 433543333332.52.52 750 VA 6554355554443 3 800 VA 6654333555444 3 1000 VA 8766444433355 4 1600 VA 1212119776665544 3 2000 VA 12111312988876665 4

Primary Fuse Sizing Chart - Refer to NEC Requirements Only (When Primary and Secondary Protection is used.) Maximum Ampere Rating for Current Limiting Class CC Fuses based on Transformer Primary Voltage Transformer VA Rating 208 V 220V 240 V 277 V 347 V 380 V 400 V 415 V 440 V 480 V 500 V 550 V 600 V 690 V 63 VA .75 .75 .5 .5 .4 .4 .4 .4 .3 .3 .3 .25 .25 .25 80 VA 1.5 1.5 1.5 1 1 1 1 .75 .75 .75 .75 .5 .5 .5 130 VA 3 2.5 2.5 2 1.5 1.5 1.5 1.5 1.25 1.25 1.25 1 1 .75 200 VA 4 4 4 3 2.5 2.5 2.5 2 2 2 2 1.5 1.5 1 250 VA 655433332.52.52.5221.5 350 VA 8776544433332.52.5 500 VA 65597666555443 750 VA 98765999877665 800 VA 99875558888765 1000 VA 12 10 10 9 7 6 6 6 5 5 5 8 8 7 1600 VA 15 15 15 12 11 10 10 9 9 8 8 7 6 5 2000 VA 20 20 20 18 14 12 12 12 10 10 10 9 8 7

Secondary Fuse Sizing Chart - Refer to NEC and CEC Requirements Maximum Ampere Rating for Current Limiting Midget Fuses Transformer VA Rating 24 V 110 V 115 V 120 V 230 V 63 VA 4 .75 .75 .75 .4 80 VA 5111.5 130 VA 9 1.8 1.8 1.8 .9 200 VA 13 2.5 2.5 2.5 1.25 250 VA 15 3.2 3.2 3.2 1.5 350 VA 20 4.5 4.5 4.5 2.25 500 VA 30 6.25 6.25 6.25 3 750 VA 45 9 9 9 4.5 800 VA 45 9 9 9 4.5 1000 VA 60 12 12 12 6 1600 VA 100 20 20 20 10 2000 VA ----- 25 25 25 12 ATTENTION: To prevent electrical shock, disconnect from power source before installing or servicing. ATTENTION: Pour éviter tout risque de choc électrique, couper le courant avant l'installation ou le réglage.

1-PHASE or "J" 3-PHASE LINES Dual Voltage Primary: Transformer shown has a dual H1 H2 H3 H4 L3 TYPICAL FUSE L1 L2 voltage primary and is connected for high voltage. For BLOCK CONNECTIONS PRI. lower voltage, remove jumper "J" and connect H1 to FOR TRANSFORMER WITH DUAL VOLTAGE H3 and H2 to H4. PRIMARY H1 L1 L2 H2 Single Voltage Primary: Transformer primary is marked H1 and H2. Wire shown connected at H1 on 1 X1 dual voltage is connected at H1 on single voltage primary. Wire shown connected at H4 on dual voltage SEC. GND. primary is connected at H2 on single voltage primary. X2 X1 T1 T2 T3 Ground: If specified, ground transformer at X2.

WHEN USED WITH A NOTE: IF SECONDARY STARTER, CONNECT TO FUSING IS NOT USED, TIGHTENING TORQUES N.C. CONTACT OF O.L. OR CONNECT WIRES TO X1 TO COIL TERMINAL. AND X2 AND REMOVE WIRE Fuse Block Terminals: (SEE SPECIFIC WIRING FROM SECONDARY FUSE 16-24 lb-in. DIAGRAM INSTRUCTIONS) Transformer Terminals: 1-PHASE or (1) #18-12 AWG CU Torque 12 lb-in / 1.4 N•m 3-PHASE LINES or H1 H2 L1 L2 L3 TYPICAL FUSE (2) Same #18-12 AWG CU Torque 12 lb-in / 1.4 N•m BLOCK CONNECTIONS PRI. FOR TRANSFORMER WITH SINGLE VOLTAGE H1 PRIMARY L1 L2 Maintain this equipment in accordance with H2 guidelines of NFPA-70B, Electrical Equipment Maintenance. 1 X1

SEC. GND. X2 X1 T1 T2 T3

WHEN USED WITH A NOTE: IF SECONDARY STARTER, CONNECT TO FUSING IS NOT USED, N.C. CONTACT OF O.L. OR CONNECT WIRES TO X1 TO COIL TERMINAL. AND X2 AND REMOVE WIRE (SEE SPECIFIC WIRING FROM SECONDARY FUSE DIAGRAM INSTRUCTIONS) TO X1.

Fuse Block Accessory Kits for use when fuse block is not integral with the transformer. ATTENTION: These control circuit fusing kits are intended to be used for control circuit transformer protection and protection of control circuits capable of delivering no more than 200,000 RMS symmetrical amperes, 600 volts maximum. ATTENTION: Ces ensembles fusibles pour circuits de commande sont conçus pour la protection des transformateurs de circuits de commande et des circuits de commande eux-mêmes a condition que ceux-ci ne puissent fournir qu'un courant symétrique efficace maximal de 200,000 ampères, 600 volts. One Pole Kit - Panel Mounted (Midget Fuse) ...... Cat. No. 1491-R165 Two Pole Kit - Panel Mounted (Midget Fuses) ...... Cat. No. 1491-R167 Three Pole Kit - Panel Mounted (Two Class CC Fuses / One Midget Fuse)...... Cat. No. 1491-R169 Three Pole Kit - Panel Mounted (Three Class CC Fuses) ...... Cat. No. 1491-R171 These kits use only Class CC or Midget fuses (rated 0.5 to 30 amperes) such as those offered by the following manufacturers: Bussmann KTK-R Ferraz-Shawmut ATM R Littelfuse KLK IMPORTANT: For control circuit transformers with a 350 VA or larger rating, it is recommended that Bussmann Type FNQ-R, Ferraz-Shawmut Type ATDR, Littlefuse Type KLDR time delay fuses or equivalent be used for primary fusing.

Single Pole Kit - Bulletin 500 Line Controller Mounted (Class CC Fuses) ...... Cat. No. 599-FR04* * - Cat. No. 599-FR04 is rated for 6 ampere fuse maximum. Controller mounting applies to size 0-5 devices only. One Pole Kit - Panel Mounted (31-60 Ampere Class J Fuse) ...... Cat. No. 1491-R173 One Pole Kit - Panel Mounted (61-100 Ampere Class J Fuse) ...... Cat. No. 1491-R175

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