SolaHD STV 25K-10S Surge Suppressor

SolaHD STV 25K-10S Surge Suppressor

Configured for transient voltage suppression and electrical noise attenuation in 120 VAC single-phase circuits, the SolaHD STV 25K-10S (STV 25K Surge Suppressor) provides series-connected protection for industrial electronic loads.

Hardware Specifications

Surge Suppression and Noise Filtering

The STV 25K-10S combines high-energy metal oxide varistors (MOVs) with sinewave tracking filtering. The MOV stage limits transient overvoltage across the specified line-to-neutral, line-to-ground, and neutral-to-ground protection modes.

The filtering stage attenuates EMI/RFI noise by up to -40 dB across the stated 100 kHz to 100 MHz frequency range. Therefore, the device addresses both high-voltage transient events and high-frequency electrical interference.

The 10 A maximum continuous load rating applies to the series hardwired connection. Installation wiring should maintain the specified load-current limitation.

The integrated LED provides local Normal / Fault indication, while Form C dry contacts provide remote status monitoring through NO/NC contacts.

Frequently Asked Questions (FAQ)

Q: What circuit configuration does the STV 25K-10S support?
A: The supplied data specifies 120 VAC single-phase operation at 50/60 Hz with L-N, L-G, and N-G protection modes.

Q: What transient current can the device withstand?
A: The specified peak surge current capacity is 25,000 A per phase for an 8/20 us impulse.

Q: How is protection status monitored?
A: Local status is indicated by an LED, while Form C NO/NC dry contacts provide remote status monitoring.

Field Installation Guidelines

• Mount the device on a compatible 35 mm DIN rail using the specified mechanical mounting arrangement.
• Verify the circuit voltage and phase configuration before connecting the surge suppressor.
• Keep line, neutral, and grounding conductors routed according to the applicable electrical installation standard.
• Minimize conductor length between the protected circuit, surge suppressor, and grounding connection to reduce transient impedance.
• Route protected signal and power wiring separately from high-noise conductors where practical.
• Connect grounding conductors with low-impedance paths and avoid unnecessary loops or extended routing.
• Maintain appropriate separation between incoming transient-exposed wiring and downstream protected wiring.
• Use the Form C contacts only within the electrical ratings specified by the applicable installation documentation.
• Confirm the LED status after energization and investigate a Fault indication before placing the protected load into normal service.
• Do not exceed the specified 10 A continuous load-current rating for the series hardwired connection.