Synchroscope. The M8100 Synchroscope provides illuminated indication of the frequency and phase deviation between voltages on two separate AC systems (e.g. a generator and a busbar). The M8100 will also indicate whether or not the two systems are live. A moving light dot indicates the frequency deviation. The magnitude of the frequency deviation is indicated by the speed and direction of the movement. Clockwise movement indicates that the frequency is too high on the incoming system. Counter clockwise movement indicates that the frequency is too low. A steady light dot at 6 o’clock position indicates zero frequency deviation and 180 degrees phase deviation. Exact synchronization. frequency and phase accordance is achieved when the light dot is steady at the 12 o’clock position (when the green LEDs ignite). The M8100 scale is made up from 38 bright red LEDs. The resolution provided by the 38 LEDs is almost as fine as a pointer synchroscope, however the LED based design is far better at withstanding environmental influence from vibration, temperature and humidity.

SE-330-03-01 is an advanced ground-fault and neutral-grounding resistor monitor with a supply voltage ac of 65–265 and a supply voltage dc of 85–275. Network communications is offered via USB; Ethernet (Dual RJ45).

SE-330-20-00 is an advanced ground-fault and neutral-grounding resistor monitor with a supply voltage ac of 28–52 and a supply voltage dc of 36–72. Network communications is offered via USB.

SE-325EST is a neutral-grounding resistor monitor with a supply voltage of 240 ac and a ground-fault trip level of 0.5–4.0 A.

SE-325N is a neutral-grounding resistor monitor with a supply voltage of 120 ac and a ground-fault trip level of 0.5–4.0 A.

NGR MONITOR HV LVPS PROFIBUS. The SE-330 is an advanced ground-fault and neutral-grounding-resistor monitoring relay. It measures neutral current, neutral-to-ground voltage, and neutral-to-ground resistance. It provides continuous monitoring of the neutral-to-ground path to verify that the neutral-grounding resistor (NGR) is intact. This is of utmost importance—an open NGR renders current-sensing ground-fault protection inoperative and could result in a false belief that the system is functioning properly. The SE-330 can be used with low- and medium-voltage transformers and generators with low- or high-resistance grounding used in processing, manufacturing, chemical, pulp and paper, petroleum, and water-treatment facilities. For high-voltage applications, use the SE-330HV. For applications that require conformance to Australian standard AS/NZS 2081.3:2002, see the SE-330AU. The SE-330 New Revision provides these additional features: 100 trip records with date and time stamp. A mini-USB interface to view measured values, configure settings and check event records using SE-MON330 v3.2 or later. An on-board microSD card (included) can be used for long term data logging and firmware upgrades. Ground-fault trip level is adjustable from 2 to 100percent in 10 discrete settings, and in 1percent increments when using the MEM setting and SE-MON330 v3.2 or later. Dual Ethernet ports are optionally available with support for fiber and RJ45 interfaces. IEC 61850 protocol is optionally available.

RELAY ELEC MPU CABLE MPU/ICT 6C CONNECT. MPU-CIM to MPU-32 Interconnect Cable, 6 m (19’) Included with MPU-CIM.

The SE-330 is an advanced ground-fault and neutral-grounding resistor monitoring relay that is compliant with Rule10-302 of the 2018 Canadian Electrical Code Part I (CE Code). It measures neutral current, neutral-to-ground voltage, and neutral-to-ground resistance. It provides continuous monitoring of the neutral-to-ground path to verify that the neutral-grounding resistor (NGR) is intact and that it has not been bypassed or shorted. An open NGR renders currentsensing ground-fault protection inoperative and could result in a false belief that the system is functioning properly. A shorted NGR results in higher-than-expected ground-fault current. The SE-330 can be used with low- and medium-voltage transformers and generators with low- or high-resistance grounding used in processing, manufacturing, chemical, pulp and paper, petroleum, and water-treatment facilities. For high-voltage applications, use the SE-330HV. For applications that require conformance to Australian standards, use the SE-330AU.

The SE-134C/SE-135 is a microprocessor-based, combination ground-wire monitor and ground-fault relay for resistance-grounded or solidly grounded systems. It continuously monitors the integrity of the ground conductor to protect portable equipment from hazardous voltages caused by ground faults. The SE-134C/SE-135 is field proven in monitoring trailing cables on large mobile equipment such as drag-lines, mining shovels, shore-to-ship power cables, dock-side cranes, stacker-reclaimers, submersible pumps, and portable conveyors.

The SE-105/SE-107 is a combination ground-wire monitor and ground-fault relay for resistance-grounded systems. It continuously monitors the integrity of the ground conductor to protect portable equipment from hazardous voltages caused by ground faults. The SE-105/SE-107 is an excellent choice for trailing cables 5 kV and under in underground mining applications. For higher voltages or long-cable applications, see the SE-134C/SE-135.

SE-325DSN is a neutral-grounding resistor monitor with a supply voltage of 120 ac-dc and a ground-fault trip level of 0.5–4.0 A.

Electronic Potentiometer. 230V AC. The T7900 Electronic Potentiometer is typically used as an interface between a unit that provides increase/decrease contacts signals and electronic speed governors or voltage regulators (AVR) controlled by analogue voltage or current signals. The T7900 works much like a conventional motorized potentiometer (e.g. the E7800). However, instead of a variable resistance, the T7900 provides a variable voltage (e.g. -5 to +5 VDC), current (e.g. 4-20 mA) or a pulse width modulated signal (PWM). The voltage and current range is programmable. The PWM output provides a 500 Hz signal with programmable duty cycle. The analogue outputs are galvanically isolated.