The Macromatic CAH05A6BC is a current sensing relay. This encapsulated relay has an input voltage of 12V DC. It monitors for over or undercurrent faults and has an output of 10A SPDT. It is used for AC current, with an adjustable range of 0.5-5A and a trip time delay of 0.5-50 seconds. There is no sensing time delay on startup. The built in current transformer provides greater access and sensitivity, since the wire can be looped around more than once. The encapsulated housing is recommended for use under harsh conditions. Note: Image is an approximation. Actual part may differ.

Specifications

• Relay Function- Over/undercurrent
• Current Monitor Range- 0.5-5A
• Time Trip Delay- 0.5-50 seconds
• Sensing Time Delay on Startup- None
• Input Voltage- 12V DC
• Output- 10A SPDT
• Input Voltage Tolerance- +10/-15% of nominal
• Load- 2VA
• Current Sensing- Type: Toroidal, through hole wiring
  Setting Accuracy: Min: +0%, -50%; Max: +10%, -0%
  Maximum Allowable Current: Steady-25A Turns; 150A Inrush for 10 Seconds
  Trip Point Hysteresis: -5% Overcurrent sensing +5% Undercurrent sensing
• Response Time- Time Delay on Reset (Relay OFF): 100ms
  Reset Time: 400ms
• Operating Temperature- -28 C to 65 C (-18 F to 149 F)
• Storage Temperature- -40 C to 85 C (-40 F to 185 F)
• Output Contacts- 10 Amperes @ 240VAC, General Purpose; 8 Amperes @ 28VDC, Resistive; 1/4HP @ 120/240VAC; B300
• Life- Mechanical: 10,000,000 Operations, Full Load: 100,000 Operations
• Mounting- Surface mount with 2 #6 screws
• Termination- 0.25" male quick-connect terminals
• Overall Dimensions- 3.5" Height x 2.5" Width x 1.5" Depth
• Approvals- UL & CUL Recognized

With the selector switch, the user can choose whether the relay monitors over or under current situations. The relay starts checking for possible faults once the input voltage is introduced. For an overcurrent situation, it occurs when the AC current goes over the set Fault Trip Current for longer than the adjusted time delay. The relay energizes after the time delay and stays energized until the current goes under the reset level. For an undercurrent fault, the current goes below the set Fault Trip Current for longer than the time delay. Again, the relay energizes after the time delay and will de-energize once the current goes over the reset level. The CAH05A6BC has an LED which glows red to indicate when a fault is found. Has pilot duty rating. It is commonly used in applications such as process control, checking for locked rotor or load loss, or open heater or lamp.

Macromatic CAH Series Relay Installation Manual

CAH05A6BC Macromatic Current Sensing Relay