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Vacuum interrupter/ operator
Relay tripping may also be achieved by employing a normally open contact in parallel with the holding coil. If this scheme is used, a resistor must be provided to limit current when the normally open contact is closed.
Position A: locked
23.0
A
Secondary and undervoltage releases are available for all standard ANSI/IEEE control voltages.
29.0
B
Construction and mode of operation of secondary release and undervoltage release
Position B: unlocked (operating position)
Refer to Figure 23: Construction of secondary shunt release (shown charged) and Figure 24: Latch details (shown
23.0
A
charged) on page 30 and Figure 25: Undervoltage lock/operate selection on page 31.
29.0
B
The release consists of a spring power- storing mechanism, a latching device and an electromagnet. These elements are accommodated
The
If the magnet coil (7.0) of the shunt release 3AX1101 is energized by a trip signal, or if the tripping pin (15.0) is mechanically actuated, magnet armature (9.0) is swung against the pole faces.
Cancel the lock for the undervoltage release by shifting the locking screw (29) from A to B.
23.0- Striker pin
29.0- Screw
Figure 25: Undervoltage lock/operate selection
01 T
| SD5 |
|
|
| 24 |
|
|
| 52o |
|
|
| 23 |
|
|
120 or 240 Vac | A1 |
| Capacitor |
(+) |
| ||
supply |
| ||
| 52T | 1 | |
| A2 | Resistor | |
|
| ||
| 34 |
| 2 |
| 52o |
|
33 | (+) | |
Rectifier | ||
| ||
| ||
| Capacitor trip |
Figure 26: Capacitor-trip device
31