Contactor,circuit breaker,solar inverter,sensor,Encoder,PLC
Product: 3TL61 series 7.2 kV medium-voltage vacuum contactor (legacy imported unit, discontinued)
3TL61: 7.2 kV voltage class; 3TL65: 12 kV voltage class. The 3TL platform is an older-generation vacuum contactor manufactured in Berlin. Its successor series is the 3TM.
Model Decoding: 3TL6113-0BM4
3TL61: 7.2 kV vacuum contactor base series
13: 3-pole, rated operating current 250 A
0: Standard version, no mechanical latching
B: Coil control voltage AC 24 V
M4: Auxiliary contact configuration: 4NO + 4NC positively-driven auxiliary switch
Key Electrical Specifications
| Item | Parameter |
| Rated operating voltage Ue | 7.2 kV |
| Rated operating current Ie | 250 A |
| Number of poles | 3‑pole |
| Frequency | 50‑60 Hz |
| Coil voltage | AC 24 V |
| Closing power | 600 W, holding power 90 W (with economy holding resistor) |
| Mechanical endurance | 3 million operations |
| Vacuum interrupter electrical endurance | 2 million operations |
| Maximum operating frequency | 1200 operations per hour |
| Auxiliary contacts | 4NO + 4NC, positively‑driven |
| Power‑frequency withstand voltage (phase‑to‑ground / phase‑to‑phase) | 32 kV, 1 min |
| Lightning impulse withstand voltage | 60 kV |
Typical Applications
Switching of high-voltage motors, capacitor banks, transformers and reactors; contactor-fuse combination (FC-circuit) inside KYN28, XGN switchgear cubicles.
Replacement Options
- Siemens original successor: 3TM3313-0BB40
(7.2 kV-250 A, AC 24 V coil, 4NO+4NC auxiliary contacts, functional drop-in replacement. Cabinet cut-out dimensions require verification.)
- Spare part order numbers:
Vacuum interrupter: 3TY5652-0AA00
Operating coil: 3TY5651-0AB00
Economy holding resistor: 3TY5664-0AA00
Maintenance Notes
When procuring spare parts for legacy units, always verify the complete type designation plus serial number from the nameplate; do not rely solely on the order number.
The 3TL61 series uses an economy holding resistor for the coil. Do not remove it during servicing.
Main-circuit resistance shall be ≤ 280 μΩ; measurement is mandatory during overhaul.
The auxiliary switch is positively-driven. Do not substitute with standard auxiliary contacts.
If you have a nameplate photo, I can help verify full compatibility. I can also compile dimension comparison tables for 3TL61 and 3TM33.
