lt is a device that can prevent failure or interruption of production facilities due
to M/C chattering (contact shaking) and trip in the event of an instantaneous voltage
drop, and has excellent reliability.
■ M/C Chattering (contact shaking), Cause of trip
Occasionally instantaneous voltage drops (Sag, Dip) in the grid during electrical equipment failure, storm, lightning
or ground failure.
■ Problems when M/C chattering (contact shaking) occurs
- M/C contact arc and opening/closing ground occurrence : Control board damage
- Inrush current and overcurrent occurrence :
ㆍFacility fuse off and inverter fault (IGBT burnout)
ㆍReduced coil insulation resistance of motor due to large impact current on motor
coil (shortened facility life)
- Reduced productivity and significant increase in facility maintenance costs
It is a product made in Korea as an AC M/C chattering protection device.
■ Maintain M/C performance up to 30% Sag of normal voltage (protect chattering)
■ If the voltage drops below 30% of the normal voltage, it is recognized as a form and the safety
circuit allows the facility to be down by emergency stop.
■ Easy installation and maintenance with DlN Rail socket method
■ Small (60x45x100mm/socket included), lightweight (0.14kg) for easy installation anywhere
■ Certification content
- CE Certificate : EN61326-1, EN55011:2009/A1:2010, EN55011:2016/A1:2017Group1[Class A]
- SEMI F47, IEC61000-4-11 Sag Immunity test passed.
Normal M/C : Unable to prevent facility down due to inrush current generation by allowing chattering to occur in the middle.
1 Second UPS Type for M/C : Capacitor compensation type products maintain M/C until a power failure of 1 second,
and there is no emergency stop mode, which may cause difficulty in the facility, and
there is a risk of failure.
Auto-Restart Type Relay : It is not suitable for precision process control equipment by allowing the M/C to
automatically recover after a specified time after a power failure
COIL-LOCKER : Even if continuous sag occurs, sag compensation is possible without any restrictions, protecting chattering
■ Sag Compensation : Constant output voltage supply to maintain contact point up to 30% of normal voltage
■ Sag Compensation Exclusion Range: lf the COIL-LOCKER input voltage fails for 6 cycles (safety circuit operation mergency stop)
■ Coil Inrush Current : Large draw current supply required at startup
■ Surge Tolerance : Designed to withstand up to 6kV/500A defined in ANSI/IEEE C62.41 Category A, B
■ Application Environment : Designed with strength and durability for common commercial and industrial applications
■ Rated Voltage and : Within 10% of rated coil voltage and temperature -29℃ to +55℃
■ ReplacementRecommended Life : Approximately 60,000 hours for continuous operation (6.5 years), more than doubled
for alternating operation
■ Walkie-talkie Tolerance : VHF passes the walkie-talkie tolerance test
■ Energy Savings : Approximately 30% less power than AC M/C alone
■ Construction Cost Reduction : Lower wiring costs than installation of stability and sag compensation devices with
independent individual control
■ M/C for SEMI-F47 & IEC 61000-4-11,34
■ M/C for Delta of Y-Delta motor starter type
■ Large buildings, fish farms, water purification
plant pumps, motor M/C
■ M/C for plant and solar inverters
■ Cooling motor M/C in IDC center
■ Ventilation M/C motor
We installed COIL-LOCKER, an anti-chattering device, only on the AC M/C at the
input end of the inverter that is being operated automatically.
■ In the event of a sag, over-current causes occasional loss of inverter, resulting in excessive expenditure on facility operation
■ As the output terminal M/C has sag tolerance following the inverter output, there is no need to take sag compensation
■ The inverter low voltage level is set to 40% based on IEC 61000-4-34 as parametere re-setting
■ Since the inverter is not chatted by the M/C, there is no large inrush current, so the IGBT operates normally without damaging
Control power passed from the COIL-LOCKER is supplied to the AC drive coil of the
1. Order Specifications (AC only) COIL-LOCKER Includes octal sockets for DIN-Rail required for installation