H3CR-G8EL Omron

What does this timer do?

This is an analogue star-delta timer designed to manage the changeover sequence in star-delta motor starting circuits. It provides timed star operation, a short transition period, and then switches to delta operation.

Is this a general-purpose timer or a dedicated star-delta unit?

It is a dedicated star-delta timer rather than a general-purpose multi-function timer. The H3CR-G8EL is specifically intended for applications where a controlled change from star to delta is required.

What supply voltage does this version use?

This version is rated for 200-240 V AC, 50/60 Hz. It should be used only within the specified operating voltage range to maintain correct timing performance.

What timing range can be set for the star period?

The adjustable star operating time ranges from 0.5 seconds to 120 seconds. The front selector allows full-scale ranges of 6, 12, 60, or 120 seconds.

Can the star-to-delta transfer delay be adjusted separately?

Yes. The transition time between star and delta is set independently from the main star timing period. Selectable transfer times are 0.05 s, 0.1 s, 0.25 s, and 0.5 s.

How many outputs are available?

This model provides three relay outputs in total. There is one output for star operation, one for delta operation, and one instantaneous output, all configured as SPST-NO contacts.

What is the benefit of the instantaneous output?

The instantaneous contact operates without waiting for the timed star period to finish. This can be useful where an auxiliary switching signal is needed immediately when the timer is energised.

What is the contact rating?

The relay contacts are rated at up to 5 A at 250 V AC or 30 V DC for resistive loads. For 125 V DC, the rated current is 0.15 A.

Is this a plug-in or screw-terminal device?

The timer itself is a plug-in style unit with 8 pins. It is designed to fit an appropriate socket rather than being wired directly through built-in screw terminals.

Which socket types are commonly used with it?

Common matching socket options include the P2CF-08 and P2CF-08-E for front connection, and the P3G-08 for rear connection. Finger-safe configurations are also available with the appropriate accessories.

Can it be mounted in a panel or on DIN rail?

Yes. It can be used for panel mounting, surface mounting, or DIN rail mounting when paired with a suitable socket and mounting accessories.

What size is the unit?

It uses a 1/16 DIN front format with a 48 x 48 mm face. This makes it suitable for compact control panel layouts where standard timer dimensions are preferred.

What are the approximate physical dimensions behind the panel?

The main body is approximately 48 x 48 mm on the front, with a depth of around 63.7 mm for the unit itself. Overall installed depth depends on the socket type used.

What level of timing accuracy can be expected?

The operating time accuracy is rated at ±0.2% of full scale maximum, with a setting error of ±5% of full scale ±50 ms maximum. The star-delta transfer time accuracy is specified separately at ±25% of full scale + 5 ms maximum.

What environmental conditions is it intended for?

It is intended for use in ambient temperatures from -10°C to +55°C without icing, with storage down to -25°C and up to +65°C. The front of the unit is rated IP40 when panel mounted.

What should be left unused during wiring?

On this version, terminal 4 should be left open and not used as a relay terminal. Wiring should follow the correct socket layout for the star, delta, instantaneous output, and power connections.