Ultiscad's TCM

UNIVERSAL TRIP COIL MONITOR

Trip coil monitors (TCM) or Trip Circuit Supervision relays, continuously verify the health of circuit breakers' trip path to ensure that trip will take place when it is required especially during short circuit faults.
Ultiscad's universal trip coil monitor (UTCM), offers unique versatility and efficiency in monitoring the health of circuit breaker trip coils.

FEATURES & ADVANTAGES:
1.	UTCM accepts a wide range voltage of 48V to 125V AC and DC.
2.	Same wiring for positive and negative DC trip bus, solving existing negative trip bus wiring limitations.
3.	Five user selectable indicator light color via DIP switch for red, green, blue, amber and white colors.
4.	Four user selectable operating modes via DIP switch for continuous trip coil monitoring or breaker status monitoring.
5.	UTCM monitors trip coil health in pre-close, post-close and in latched trip states.
6.	In continUous monitoring mode, UTCM logically detects misoperating breaker auxiliary contacts and turns off the indicator light when auxiliary contacts (52a and 52b) are both closed or both open at the same time. DIP settings are available, based on application requirement to keep the relay energized, or to be de-energized when both 52a and 52b contacts are closed due to broken auxiliary contacts. This exclusive feature of UTCM is important to notify operators that a misoperating contacts fault has occurred, while signaling host control system or SCADA through the change-of-state of its form C contact (terminals 4, 5, 6).
7.	More than 250 milliseconds relay dropout time guarantees no false alarms during 52a and 52b switching transitions.
8.	Saves costs and delays associated with changing orders caused by errors in TCM selection and ordering. It is a single-model product adjustable to function in any TCM mode desired.
9.	UTCM's replaceable bulb has a lifespan of about 50,000 hours (5 years). Lighting is by combined effect of single diffused RGB LED bulb and outer dome lens (by LEDiL) for 340 degrees omnidirectional light, giving good visibility while reducing glare. UTCM is built with high quality materials, designed to far outlive its bulb, and is sold with a limited 5 years warranty.

TYPICAL WIRING

UTCM-3 is self-powered, user friendly and accepts a wide range of 48V-125V AC or DC voltage. The inputs 1,2 and 3 are non-polarized, allowing same wiring for equipment with positive or negative DC trip bus, solving the limitation of using trip coil monitors on equipment with negative DC trip bus. Terminals 3, 4 and 5 are form C dry contacts of internal relay used for integration to SCADA.
Typical wiring drawings are shown in figures 1 and 2 below.

Note that in figure 1 (recommended wiring), the 52b contact is wired through the trip coil to UTCM which allows for monitoring the health of the trip coil before the breaker is closed (pre-close monitoring). It is important to confirm that a breaker can be tripped before closing it, because of hazards associated with a breaker not tripping when required.
In figure 2, the 52b contact is not wired through the trip coil and some users adopt it as a means of keeping the TCM relay energized when the breaker is tripped. Trip coil monitoring will only take place after the breaker is closed (post-close monitoring), if wired as shown in figure 2.
Figure 1 wiring allows for trip coil monitoring in pre-close, post-close and latched-trip (contact that caused trip is maintained closed) states.

DIP SETTINGS, FUNCTION MODES & INDICATOR LIGHT COLORS

A unique feature of UTCM is the user adjustable function modes and indicator light color via settings on DIP switches S1 and S2 (See figure 3).
UTCM operates in 4 modes as follows:
Mode 1: Continuous monitoring with relay remaining energized when both inputs (1-2, and 1-3) are high.
Mode 2: Continuous monitoring with relay de-energized when both inputs (1-2, and 1-3) are high.
Mode 3: Status monitoring with relay remaining energized when both inputs (1-2, and 1-3) are high.
Mode 4: Status monitoring with relay de-energized when both inputs (1-2, and 1-3) are high.
In continuous monitoring, the UTCM indicator stays on in normal condition whether the breaker is open or closed. In status monitoring, the indicator is turned on only when the breaker is closed and turns off when the breaker is open.
Tables 1 and 2 below show the DIP settings, function modes and UTCM operation.

TABLE 1. FUNCTION MODES (SELECTABLE USING DIP SWITCH S1).

S/N	UTCM WORKING MODE	FUNCTION MODE	DIP SWITCH S1 SETTING	TRIP COIL / 52b CONTACT STATE	TRIP COIL / 52a CONTACT STATE	REMARK	UTCM INDICATOR LIGHT	4-5 NO CONTACT STATE	4-6 NC CONTACT STATE
A	Alarm Status / Continuous Monitoring	1	0 0 0	Open	Closed	Breaker closed	On	Closed	Open
				Closed	Open	Breaker open	On	Closed	Open
				Open	Open	Broken contact / coil	Off	Open	Closed
				Closed	Closed	Broken contact	Off	Closed	Open

		2	0 0 1	Open	Closed	Breaker closed	On	Closed	Open
				Closed	Open	Breaker open	On	Closed	Open
				Open	Open	Broken contact / coil	Off	Open	Closed
				Closed	Closed	Broken contact	Off	Open	Closed

B	Breaker Status Monitoring	3	1 0 0	Open	Closed	Breaker closed	On	Closed	Open
				Closed	Open	Breaker open	Off	Closed	Open
				Open	Open	Broken contact / coil	Off	Open	Closed
				Closed	Closed	Broken contact	Off	Closed	Open

		4	1 0 1	Open	Closed	Breaker closed	On	Closed	Open
				Closed	Open	Breaker open	Off	Closed	Open
				Open	Open	Broken contact / coil	Off	Open	Closed
				Closed	Closed	Broken contact	Off	Open	Closed

TABLE 2. INDICATOR LIGHT COLOR (SELECTABLE USING DIP SWITCH S2).

DIP SWITCH S2 SETTING		LIGHT COLOR
1 0 0 0		Red
0 1 0 0		Green
0 0 1 0		Blue
1 1 0 0		Amber
1 1 1 0		White

DOWNLOADS: User Manual Datasheet

SPECIFICATIONS
Input Voltage:	Nominal: 48V to 125V DC/AC, Self-Powered. Range: 40V to 145V DC/AC. AC Frequency: 50/60 HZ.
Current Draw:	30 mA at 125 VDC
Power Consumption:	3.5 Watts
Input Resistance:	4.1 KOhms
Form C Dry Contact:	Make/Break/Carry: 1 A resistive load. Drop-Out Delay: > 350 ms At 100V
Protection:	Protection: Metal Oxide Varistor 150 VAC, 200 VDC
Lighting:	Bulb: Replaceable Discrete 5mm RGB LED Bulb. Lens Material: Polycarbonate (UL 94V-0), 340° Omnidirectional, 145° Viewing Angle. Visibility: Good, Reduced Glare.
Operating Temp:	-30 ° C to +55 ° C (-22 ° F to +131 ° F)

DIMENSIONS. All dimensions below are in mm. Mounting hole diameter is 15mm - 16mm.

TERMINALS AND WIRING
Wire: AWG 12-16 CU	1 or 2 Wires Allowed Per Termination.

CONFORMITY TO STANDARDS
IEC 60073 & NFPA 79:	Mandatory Color Coding - Colors must convey operational meaning consistently.
RoHS Compliance:	UTCM-3 is made of RoHS compliant parts and components.