Blue Sea Systems Switch Battery HD Series ON/OFF

Blue Sea Systems HD-Series 3001 Single Circuit ON/OFF marine battery switch with Alternator Field Disconnect (AFD), primarily for use with large diesel engines. This switch has a 600A continuous current rating, a maximum cranking/starting rating of 1750A for 30 secs and a voltage rating of 32V DC, making it suitable for use with 12V & 24V systems. The single circuit ON/OFF configuration allows switching a single battery (or bank of batteries) to a load group, and it can be used to disconnect the battery in emergencies or when the vessel is not in use.

This switch has an AFD facility to prevent damage to the diodes in an external alternator regulator in the event that the switch is turned OFF whilst the engine is running. The AFD is constructed in such a way that the AFD switch does not close until slightly after the main switch contacts have closed and it opens slightly before the main switch contacts open. This ensures that there will always be a path for the alternator's output current when the alternator is producing power. Note: The field disconnect will only work on alternators with an external regulator.

Alternatively, instead of protecting the diodes, the AFD can be used to indicate when the battery switch is in the ON position. The AFD terminals are connected whenever the switch is in the ON position, so various indicators, such as warning lights or alarms, can be connected to them which will be activated only when the battery switch is ON.

The HD-Series range of battery switches are engineered for use in harsh marine environments in applications requiring high power output, high reliability, and low heat generation. The M12 (1/2") tin-plated copper terminal studs provide maximum conductivity and corrosion resistance, whilst their one-piece design ensures that they cannot work loose over time, and the risk of over heating is reduced. The studs are 22mm long and there are two common-connected studs for the loads, allowing multiple cables to be connected.

The ignition-protected case design is standardised across the range and has an IP66 waterproof rating, can accept cables up to 120mm² (4/0 AWG) in cross-section, and can be surface or rear panel mounted. The design of the actuating knob includes raised features that allow the position of the switch to be determined by feel - useful if operating in confined spaces.

An optional label set is available (see Further Information below).

Features

600A continuous current rating
32V voltage rating
Alternator Field Disconnect (AFD)
Tin-plated copper terminal studs for maximum conductivity & corrosion resistance
One-piece terminal stud design never works loose
Accommodates up to 120mm² cables
Twin, 22mm long load studs accept multiple M12 ring terminals
Case design allows surface, rear, or front panel mounting options
Tactile indicators convey knob position by feel
Waterproof rated to IP66
Ignition protected