Main features

HBA-21(For relay contact)

Heater break alarm supporting control system where proportioning cycle time of the temperature controller is long (20 seconds or more).
Supported CT: CV-1
Use of two pairs of CTs enables this device to be used for three phase heater.

Become discontinued on November 30th, 2022

HBA-22 (for relay contact and SSR drive outputs)

Heater break alarm supporting control system where proportioning cycle time of the temperature controller is short (approximately 2 seconds or more).
Supported CT: CTL-6-P-□ , CTL-18S-□
Use of two pairs of CTs enables this device to be used for three phase heater.

Main specification

HBA-21 (for single phase, relay contact output system)

• Input type: Current transformer (CV-1-□)
• Detectable load current: 5A, 30A, 100A ac (depends on CV-1 rating)
• Settable range: 10 to 100% of CV-1 rated value
• Alarm range: when current changes by 10% or more of the CV-1 rated value (full scale).
  ※ When the current change is smaller than 10%, the action is uncertain.

HBA-22 (for single phase, relay contact or SSR drive)

• Input type: Current transformer (CTL-6-P-□, CTL-18S-□)
• Detectable load current: 5A, 10A, 20A, 30A, 100A (depending on CT rating)
• Settable range:

5A : 20 to 100% of rated value of CTL-6-P

10A, 20A, 30A : 50 to 100% of rated value of CTL-6-P

30A, 100A : 50 to 100% of rated value of CTL-18S

• Alarm sensitivity: Alarm is activated ｗhen the current changes by 15% or more of the rated value (full scale) of the CTL.
  ※Changes below 15% may not activate the alarm.

<Common specification>

• Alarm output: 2 points, Relay contact, 1a contact
• Supply voltage: 100/110V or 200/220V, (whichever is specified), 50/60Hz
• Power consumption: 1.8VA or less
• Ambient temperature: -10 to 50°C

External dimensions

Units : mm

Models