Related Manuals for ABB KA-4
Summary of Contents for ABB KA-4
- Page 2 41-923.4M Figure 1. Type KA-4 Relay without case. (Front View)
- Page 3 41-923.4M Sub 3 Sub 9 629A389 629A476 Figure 3. Internal Schematic of the Type KA-4 Relay for TC Figure 2. Internal Schematic of the Type KA-4 Relay for KR Carrier Set. Carrier Set. Sub 1 Sub 1 3491A17 349A16 Figure 4. Internal Schematic of the Type KA-4 Relay with Figure 5.
- Page 4 With the contacts closed, the electrical connection is Figure 6. Typical Time Characteristics of carrier start over- made through the stationary contact housing clamp, current unit of the type KA-4 Relay. to the moving contact, through the spiral spring out to the spring adjuster clamp.
- Page 5 41-923.4M Shunt Permanent Magnet Additional Flux Path Armature Moving Contact BALANCED AIR GAPS UNBALANCED AIR GAPS 183A062 Figure 7. Permanent Magnet Flux Paths of Receiver and Alarm Units ating to close the RRP and RRG contacts and trip; In these relays, an electromagnet attracts a right and the holding coil, RRH to hold the RRP and RRG angle iron bracket which in turn operates one nor- contacts open and block tripping.
- Page 6 41-923.4M the rear mounting stud or studs for projection mount- ing. Either a mounting stud or the mounting screws For Use With KR-Set Avg. Avg. Avg. may be utilized for grounding the relay. The electrical Ohms Ohms Ohms connections may be made directly to the terminals by CSP or CSG Coil means of screws for steel panel mounting or to the CSP &...
- Page 7 41-923.4M relay (front view). Apply rated voltage across the 6.1.4. Squelch Unit (SQ) RRT coil and the RRT coil resistor, observing polarity Apply rated dc voltage to relay terminals that will as shown in the internal schematic. The armature energize the squelch unit and note contact operation. should move to the left.
- Page 8 41-923.4M With the moving contact in the normally closed posi- 250-volt relay. These units have an intermittent rat- tion, i.e., against the right side of the bridge, screw in ing, and should not be energized for more than a few the stationary contact until both contacts just close.
- Page 9 41-923.4M Increase the holding coil current to 60 milliamperes 7.3. FOR RELAY TO BE USED WITH TC-TYPE CARRIER and adjust the left-hand shunt screw until the arma- ture resets, or moves to the right. If the armature 7.3.1. Receiver Unit resets at a value of current less than 60 milliam- Back off contact screws so that they do not make peres, the left-hand shunt screw should be turned...
- Page 10 41-923.4M 9.0 ENERGY REQUIREMENTS 7.4. FOR RELAYS TO BE USED WITH KR-TYPE CARRIER OR TA-3 TONES 9.1. CURRENT BURDEN AT 60 CYCLES 7.4.1. Receiver Unit Calibrate as outlined under TC Type Carrier. Apply Power Current Volt Factor 15 mA dc current for polarity check. The pickup value Amperes Amperes Angle...
- Page 11 41-923.4M THIS PAGE LEFT BLANK...
- Page 12 41-923.4M Sub 4 5307D96 Figure 8. Typical External Schematic of a KA-4 Relay in a KD-4/TC Blocking System...
- Page 13 41-923.4M Sub 4 5307D96 Figure 8. Typical External Schematic of a KA-4 Relay in a KD-4/TC Blocking System...
- Page 14 41-923.4M Figure 9A. Typical External Schematic of a KA-4 Relay in a KD-10/TC Blocking System...
- Page 15 41-923.4M Figure 9B. Typical External Schematic of a KA-4 Relay in a KD-10/TC Blocking System...