ABB CT Series Multifunctional Timer Relay

The ABB CT-APS is a compact, multifunctional industrial timer relay that delivers twelve selectable timing functions — including on-delay, off-delay, on/off-delay, single-pulse, and interval timer — selectable via front-panel DIP switches without rewiring or reprogramming. The timing range spans from 0.05 seconds to 100 hours, covering every control timing requirement from high-speed relay de-bounce sequences to multi-hour process cycle timing in a single device. The wide universal supply voltage of 24 to 240 V AC/DC means the same CT-APS can be stocked and installed regardless of the panel's auxiliary supply voltage, dramatically simplifying spare parts management in Saudi Arabia's industrial facilities where panels from different eras may use 24 V DC, 110 V AC, or 230 V AC control power.

The CT timer's narrow 17.5 mm DIN rail footprint allows side-by-side installation with control relays and contactors in compact panel configurations, and the combination of an LED status indicator and an analogue timing progress bar provides visible confirmation of both coil energisation state and elapsed timing fraction — allowing maintenance technicians to observe timer operation in real time without a timing meter. Timing accuracy of ±0.5% of the set range with temperature stability across -20°C to +55°C operating range ensures the CT-APS maintains its set delay throughout Saudi Arabia's extreme seasonal temperature variation, unlike older bimetallic or RC timers whose timing drifts significantly with temperature change. The output contact is rated at 8 A, 250 V AC, driving most industrial contactor coil loads directly without intermediate relay amplification.

Timer relays are among the most fundamental building blocks of industrial motor control panels, and the CT series is the most widely installed timer relay family in Saudi Arabia's industrial sector. Star-delta motor starters — which require a precisely timed transition delay between the star and delta contactor — use CT-APS timers for the transition timing function. Pump alternation panels use off-delay timers to maintain one pump running after a duty/standby switchover signal. Process sequence panels in SABIC and ARAMCO facilities use CT-APS interval timers for timed sampling, injection, and dosing cycles. HVAC control panels use on-delay timers for chiller sequencing, cooling tower fan delay start, and alarm acknowledgement timeout functions. The reliability and simplicity of the CT-APS make it the first choice for Saudi panel builders who need proven, affordable timing in industrial environments where relay failure means process downtime.

Razz Middle East maintains permanent CT-APS stock in all standard timing ranges (0.05–1 s, 0.5–10 s, 5–100 s, 1–20 min, 1–10 h, and 1–100 h) for same-day supply across Saudi Arabia, and supplies CT series timers in bulk to MCC panel builders and in single units for maintenance replacements.