In substations, switchyards and power plants, dry contact signals from protection relays, transformer protection devices, DC systems and auxiliary equipment are collected on the annunciator panel. When an alarm occurs the corresponding window flashes and the horn sounds; once the operator acknowledges the alarm the light becomes steady, and when the fault clears it is extinguished with reset. This behaviour is configured according to the ISA 18.1 alarm sequences.
Channel options
8-Window Annunciator
Eight independent dry contact inputs and eight illuminated windows. Suited to small switchyards, generator panels, pumping stations and compact auxiliary systems. Mounted on the panel door in a 4×2 or 8×1 window layout.
16-Window Annunciator
Sixteen independent dry contact inputs and sixteen illuminated windows. Suited to substations, transmission substation projects and multi-feeder switchyards. Available in 4×4 or 8×2 layouts; several panels can be placed side by side to increase channel count.
General specifications
- Input type
- Dry contact (NO / NC selectable), voltage-free
- Supply
- 24 / 48 / 110 / 220 VDC or 220 VAC options
- Indication
- Long-life LED backlit, writable window legend
- Audible alarm
- Built-in horn; an external horn output can be provided
- Control buttons
- Acknowledge · Reset · Test / Lamp test
- Alarm sequence
- ISA 18.1 (F1A, F2A, F3A, etc.) — per project specification
- Relay output
- Common alarm output, transferable to the RTU or SCADA system
- Mounting
- Flush panel-door mounting; can be integrated into the protection & control panel
Areas of use
- Substation protection & control panels
- Switchyard auxiliary systems
- Generator and motor control panels
- DC supply and rectifier systems
- Water intake and pumping stations
- Industrial process plants