Technical Information KT7 Controller Time-Current Characteristic KT7 Manual Motor Starter/Protector 1. Thermal Release Trip Current The adjustable current-dependent delayed bimetal release protects motors against overload. The curve shows the mean operating current at an ambient temperature of 20 C starting from the cold state. Careful testing and setting ensures effective motor protection even in the case of single-phasing. The overload characteristic is also valid for transformer protection. 2. Magnetic Release Trip Current The instantaneous magnetic trip has a fixed operating current setting. This corresponds to 13 times the maximum value of setting range (high inrush protection -20 x I e maximum). At a lower overload setting the magnetic trip is correspondingly higher. Current Setting I ef The overload trip corresponds to a thermal overload relay in a motor starter conforming to IEC 947-4-1. If a different value is prescribed (e.g., reduced I e for cooling medium having a temperature higher than 40 C or a place of installation higher than 2000 m above sea level), the setting current is equal to the reduced rated current I e of the motor. Cut-off Current KT7-2S F KT7 F29
Technical Information KT7 Controller Cut-off Current KT7-2H and KT7-H FKT7 F30
Wiring Diagrams KF7 with KT7 Controller KF7 Fuse Holder used with CA7 Contactor KF7 Fuse Holder used with KTA7 Controller and CA7 Contactor F KT7 F31
KT7 Controller KT7 Bus Bar and Supply Blocks CA7/KT7 Connection Modules and Kits 1) Ecombo Modules Electrical and mechanical connection between motor circuit controller and contactors with AC coil. For CA7-9...23 only. Compatible with the reversing- and WYE-delta starter components. FKT7 2) Standard Connection Modules Electrical connection between motor circuit controller and contactors with AC coil. For CA7-9... Compatible with the reversing- and WYE-delta starter components. 3) Coil Extension Modules Simplifies access to the coil terminals on 3-component starters. For CA7-9...23 = KT7-2S-PSC23 For CA7-30...43 = KT7-H-PSC43 F32
KT7 Controller KT7 Design B (without Terminal Adaptor KT7-2[]-TE) KT7-2 Design C (without Terminal Adaptor KT7-2-TE1) 6 ➊ 4, 90 ➊ 24,8 4, 44 70 4, 4 80 F ➊ Mounting on 3 mm DIN Rail EN 0 022-3 ➋ Auxiliary contact (side-mounted). Adds 9mm (23/64) ➌ Undervoltage trip or Shunt trip ➍ Auxiliary contact (front-mounted) KT7-2S KT7-2H KT7 F33
KT7 Controller KT7 Design B (with Terminal Adaptor KT7-2[]-TE) KT7-2-TE1 KT7-2S with Terminal Adaptor KT7-2-TE (KT7-2S) KT7-2H with Terminal Adaptor KT7-2-TE KT7-2-TE1 KT7-H with Terminal Adaptor KT7--TE (KT7-2H) KT7-2 Design C (with Terminal Adaptor KT7-2-TE1) 44,7 42,4 4,9 43,9 24,8 13,9 64,9 3,9 34,8 23,9 1 1 3 3 3 3 1 1 10 ( 10 ) ( ) ( 10 ) 10 ( ) ( 4,9 ) ( 64,9 ) KT7-2S with Terminal Adaptor KT7-2-TE1 KT7-2H with Terminal Adaptor KT7-2-TE1 Mounting Position KT7-2S, KT7-2H, KT7-H 3,7 99 49,3 91 FKT7 T3 T2 T1 8,8 63,6 F34 T1 T2 T3,7 ( 63,6 )
KT7 Controller KT7 Controller Door Coupling Handle KT7-HTC Coupling is included in Door Handle Kits KT7-HTN and KT7-HTRY. This coupling replaces the knob shipped as standard on the controller. Design D Door Coupling Handle Kits include an interface for the Stops molded into Design C KTA7/KTB7/KTC7, which inhibits excessive rotation of the handle mechanism. The old Design C Door Handle Kits will fit new Design C (shipped in WHITE boxes), but will not take advantage of the Stops. Design D Door Handle Kits are backward compatible. Includes 20mm Shaft KT7-HT a Includes 400mm Shaft KT7-HTL b No Shaft c1 c2 KT7-2S 117 338 (4.6 13.3 in) 117 488 (4.6 19.2 in) 10. ± 49. 40. KT7-2H KT7-H 126 347 (.0 13.7 in) 148.6 369.6 (.4 14. in) 126 497 (.0 19.6 in) 148.6 19 (.4 20.4 in) 114. ± 49. 40. 137.1 ± 9.3 0.3 F KT7 F3
Mounting Modules Type W Mounting Modules & Spacer 12 9 8 FKT7 228 Catalog Number A B C D E F W-32489 (KA7-WSRR) W-32490 (KA7-WSRR) W-32496 (KA7-WMRR) W-32497 (KA7-WMRR) 228 (8-31/32) 228 (8-31/32) 283 (11-9/64) 283 (11-9/64) (1-2/32) 4 (2-1/8) (1-2/32) 4 (2-1/8) 69 (2-23/32) 69 (2-23/32) 69 (2-23/32) 69 (2-23/32) 16. (6-3/64) 174 (6-27/32) 166. (6-3/64) 174 (6-27/32) 210 (8-17/64) 210 (8-17/64) 26 (10-7/16) 26 (10-7/16) 3 (1-3/8) 40 (1-37/64) 40 (1-37/64) 40 (1-37/64) Spacer W-329 F36