A lighting system designer generally has a choice of using a lighting control relay or individual lamp controls. In some cases, self-controlled luminaries are a good option. However, when the lighting system exceeds five or six separate lights, or when coordinated coverage of a larger area is required, a lighting control relay should be considered. Lighting control relays offer several unique advantages:

• They allow a single point of maintenance for the photocell
• The main circuits are energized only when needed
• Lightning protection can be provided for both line and control circuits
• The relay serves as a safety disconnect and isolation point should circuit service be required  
• Relays provide coordinated switching of multiple lighting elements
• They allow a single control point for operation

Trinetics offers an extensive line of relay lighting controls, commonly referred to as RCOC (Remote Control of Outdoor Circuits) relays. The lighting controls are available with contact types as follows:

• Air contacts
• Sealed contacts

Lighting Control Relays - Air Contact

Lighting control relays with conventional air contacts are available in a broad mix of configurations. These lighting control relays are easily identified as type MR series, RLY series, service point, or group lighting controls.

• Lighting Control Relays: Air Contact - MR Series
• Lighting Control Relays: Air Contact - RLY Series
• Lighting Control Relays: Air Contact - Special Series

Lighting Control Relays: Sealed Contact

The sealed lighting control relays are constructed with ruggedized mercury tube contactors that are hermetically sealed, no contact wear points, offer spark-free operation and have only one moving part.

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