|
Earth
Wire Monitor
Rugged unit to monitor earth
wire integrity between point of connection and the transformer star
point
on a 525V 3-phase system.
Can be made for other voltages and a range of sensitivities and
trip delays
EWM model: Earth Wire Monitor for
installation at load side (e.g. motor)
ERM model: for installation on minisub to monitor the Neutral
Earthing Resistor
ERCM model: to monitor the Neutral Earthing Resistor as well as the
Earth Fault current |
|
SVC
Motor start-up Sequence and Vigilance
Controller
intended for safety on winch motors, underground motors
etc. |
|
|
Celtifier
for monitor &
control through SMS's and miss-calls using your
cellphone.
Just needs your SIM card and off you go. |
 |
|
Wireless proximity
detection
used for collision avoidance in underground
locos
working on
433MHz |
 -> |
|
Agent for the above mining monitor
products:
JoJen Supplies - John: 083
230161 |
|
|
Digital
Timer with
DIP switches
settable range: 0.25 – 63.75
seconds
in steps of 0.25 sec
(longer times can be arranged) |
70 x 50 x 23mm
|
| USB-RS232-I2C-PIC
programmer Adaptor box |
|
|
low cost Fluid
immersion sensor |
|
Telephone recording
interface
detects on/off-hook,
digitises sound and transmits WAV packets
to PC via USB |
70 x 50 x 23mm
|
|
Spinning wheel with
20 lights
and
controller
for probability based on
programmed probablilities.
Each number appears at random
intervals but has a predefined number of hits out of a specified
number (300 in this example) |
 <- |
|
Podium display with response
buttons
and controller
Each display box has a
thumbwheel number entry associated with it,
after setting up a button is pressed to display the
number |
 |
|
EDMU:
Energy
Display and Management Unit
For installation in homes to
manage peak consumption
by warning, disconnecting and reconnecting load
circuits
with
internal and external data links |
|
|
|
|
|
Affiliate
Products
|
|
|
passive metal
detector
Portable, lightweight and battery operated, fold-up model
available.
Based on a sensor module (Mercutech) which monitors small
changes in the earth's magnetic field.
(See article on
microvolt amplilfier)
Contact Roteck |
 -> |
|
Dual beam for
outside use
Developed, manufactured and sold by
MJR: contact Martin at 082 3902448 |
 |
|
Legacy Designs
|
|
|
Automated PC
controlled test station with
- 2 serial communication links
- controlled 3-phase current oputput
- cotnrolled 3-phase voltages
- manual override
[2007] |
 |
Multifunction Earth Fault
Protection Relay
with SCADA Comm.s (Profibus)
[2002] |
 |
Nurse call system with
mimic panel
for 80 bed units on serial bus,
full event records in non-volatile memory
[1997] |
 |
Socket Tester
for testing the integrity and safety of South
African power outlets
(being redesigned for
ruggedness) |
  |
|
DC earth leakage
monitor
2mA
resolution on 50mA range.
Using magnetic toroids,
based on core balance and BH nonlinearity
[1997] |
 |
Test
station
for Eskom's Remote Terminal
Units
in their Acquisition and Telecontrol system.
[1994] |
 |
|
Field test
unit, based on the 8751, C and Assembler
for a missile launcher including optical, RF detectors and
gyros
[1990] |
 |
Motor protection
Relay based on analog simulation of an accurate thermal
model of an induction motor.
[1979] |
 |
|
Passive earth
fault protection Relay
(20-2000mA-ac, 250-2500msec) for
high-voltage installations
(Erich's first patent)
[1978] |
 |
