PCB Automatic switch-off
Safe shutdown of the main contactor despite the regenerative effect of the motor
Models Automatic switch-off CCST and Prices
Image | Operating voltage | Current input | Switch-on thresholds | Switch-on delay | Switch-off delay | Switch contact potential-related | Switch contact potential- free | Art.-No. | Price incl. VAT |
---|---|---|---|---|---|---|---|---|---|
CCST current-controlled automatic switch-off without delay | 230 V |
16 A |
~ 0.6 A |
~ 10 ms
|
~ 80 ms | X | - | 8700.5920 | € 46,16 Order In Stock: 269 |
- | X | 8700.5922 | € 47,40 Get a quote In Stock: 0 | ||||||
400 V | X | - | 8700.5921 | € 49,47 Get a quote In Stock: 0 | |||||
- | X | 8700.5923 | € 50,69 Get a quote In Stock: 0 |
Technical data
Models CCST | 8700.5920, 8700.5921, 8700.5922, 8700.5923 |
---|---|
Permissible voltage range | 85-110 % |
Current input | 16 A continuously 35 A for 5 s |
Switched output contact | 3 A continuously 5 A inrush current For switching a control circuit Standard version: contact potential-related Special version: potential-free contact |
Test voltage open contact | 750 V AC eff |
Switch-on threshold | ~ 0.6 A Adjustable version ~ 0.1 .... 0.6 A |
Switch-off threshold | ~ 0.4 A Adjustable version ~ 0.1 .... 0.4 A |
Switch-on delay | ~ 3 s Adjustable version ~ 0.5 .... 8 s |
Switch-off delay | ~ 7 s Adjustable version ~ 0.1 .... 12 s |
Power consumption, performance | 22 mA / 0.6 W |
Ambient temperature | 0 ... +45° C |
Dimensions (LxWxH) | 75 x 54 x 18.5 mm (230 V version) 75 x 54 x 21.5 mm (400 V version) |
Wiring diagrams
Connection example CCST 230 V current-controlled automatic switch-off for type 8700.5920 | Wiring diagram |
Description CCST, current-controlled automatic switch-off
CCST current-controlled automatic switch-off without delay
We have developed a new control board CCST (Current Control Switch Timer), which detects the switch-off and ensures that the main contactor switches off safely despite the motor's regenerative effect. This control board ensures that there is no restart in the event of a short mains disconnection (greater than 0.2s) and that the plug pins of the SSK or the mains cable are pulled within max. 0.6s are voltage free. We are therefore sure to meet the requirements of DIN EN 60204 with max. 60V after 1s.
The current-controlled automatic switch-off opens a self-holding contactor when the power supply is interrupted. If the power supply is then restored, an uncontrolled restart of a machine is reliably prevented. In contrast to an undervoltage release, this also works if a rotating machine with a flywheel still induces a voltage.
The automatic switch-off receives its operating voltage via connections L1 and N.
The control signal of the overrun control is the load current of the connected consumer. The controlling consumer is connected between the connections L1 Load and N.
If the consumer is switched on, the relay picks up without delay and the contact SP is connected to the N terminal. As soon as the load current is interrupted, the relay is opened again without delay. The relay controls the self-holding circuit.
Depending on the version, the module may only be operated at 230V or 400V.
The device must be protected against this module.
When the operating voltage is applied to the automatic switch-off, the relay is briefly closed. It follows that an electromechanical contact of the contactor must be in series with the SP contact. The operating voltage must also be applied to the automatic switch-off before the consumer is switched on.
If a potential-free switch contact is required, the bridge (plated-through hole) between the connections N and NSP must be separated with a 3mm drill. The copper ring around the hole should be removed completely. The switching contact of the relay is then between SP and NSP.