Vetus Series-Parallel Switch BPSPE — Installation Manual
How the Vetus BPSPE series-parallel switch gives a 24 Volt bow thruster its supply from two 12 Volt batteries charged by a 12 Volt system: wiring, installation checks and contact ratings.
Technical Data
| Item | Value |
|---|---|
| Main contact | 1 x Normally open: max. current continuous, not switching 400 A; during 60 sec. 1000 A |
| Charge contacts | 2 x Normally closed: max. charging current continuous 100 A; intermittent at 20% duty cycle 150 A |
| Coil | 12 V DC, 2.4 A |
| Dimensions | 240 × 180 × 100 mm |
Never draw more than 100 A continuous through the charge contacts: never use these batteries as starter batteries and never connect an anchor winch to them.
Principle
- While the thruster runs, the two 12 Volt batteries are connected in series to give 24 Volt; while charging they are in parallel on the 12 Volt charging system.
- The switch operates automatically as soon as the thruster is used and switches off with a delay afterwards.
- An isolating switch in the charging wire lets you separate the battery sets when not charging for a long time, to prevent excessive discharge.
- If the thruster batteries also feed 12 Volt loads, both batteries supply them through the charging wires and charge contacts.
Wiring
- Disconnect all battery wires before extending an existing installation with the switch and 2 extra batteries.
- Fit the switch close to the batteries and thruster, in one of the illustrated positions.
- Batteries: same type, capacity and age; total capacity per the thruster manual; as close as possible to the thruster.
- Main circuit wires of sufficient cross-section, with a main switch and fuse in the + wire to the thruster; main switch OFF while connecting.
- Charging wires of sufficient cross-section; do not connect the alternator wire to terminal 51 yet. If the same alternator also charges another battery set, separate the circuits with a battery isolator.
- Connect the control wire to the panel only, not yet to the thruster.
Checks
- Check all wires against the diagram.
- Voltmeter: 12 Volt between + of battery 1 and − of battery 2, and between + of battery 2 and − of battery 1.
- Switch on the panel and operate the direction switch: the series-parallel switch engages; check 24 Volt between + of battery 2 and − of battery 1.
- Connect the control wire to the thruster and operate the direction switch: the thruster relay must operate.
- Connect the alternator wire to terminal 51 (+ALT), switch on the thruster main switch and check that the thruster works properly.
Terminals
| Terminal | Connection |
|---|---|
| 30 (+BAT1) | Battery 1 + |
| 31 (-BAT1) | Battery 1 − |
| 30a (+BAT2) | Battery 2 + |
| 31a (-BAT2) | Battery 2 − |
| 51 (+ALT) | Alternator charging wire |
Wiring diagram legend: alternator, batteries 1 and 2, 12 Volt loads, control panel and extension cable, battery isolator, battery for 12 Volt loads only, main circuit wires (cross-section per thruster manual), charging wires, isolating switch.
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Products in this Manual
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Vetus Series Parallel Switch for 24V Thruster with 12V charging System
VTSBPSPE
$1,510.00 USDList Price: $1,990.82 USDUnit price /Unavailable
