Novus Static Switch 4860 User manual

NOVUS AUTOMATION 1/5
Solid State SSR Biphasic 60, 80 and 100 A
Model with 2 SSR
INSTRUCTION MANUAL V1.0x A
Product marketed by NOVUS Automation.

NOVUS AUTOMATION 2/5
1. PRESENTATION
The SSR Static Switch is an electronic device used to drive resistive and inductive loads with numerous advantages over conventional
electromechanical (contactor) relays. A control signal determines the activation of the load connected to the power terminals of the device.
Differentials of this product:
•No electrical noise, sparking or mechanical wear;
•Status indicator light (LED) on or off;
•Internal protection circuit (Snubber) for the output;
•Zero Crossing: turns on at zero Volt and turns off at zero Ampère;
•Optical isolation between command and power.
2. IDENTIFICATION
Attached to the device is the identification tag. Check if the features described on this tag are in accordance with what was requested.
3. OPERATION
After receiving a command signal at its input terminals, the static switch conducts (turns on) and feeds the load. The conduction happens effectively
at the next zero crossing of the mains voltage. The same happens in the shutdown. The command signal is removed, but the key only effectively
blocks (turns off) the next zero crossing of the electric current on the load.
Fig. 01 –Electrical voltage on a resistive load
This implies delays never exceeding 8.3 milliseconds between the tripping time of the ON/OFF command and the effective charging/discharging of
the load.
Turning the load on and off at zero crossing always brings important advantages to the installation. Practically no electrical interference is
generated at the installation and the switch is not subjected to severe switching conditions.
It is impossible to switch DC voltage, only alternating voltage (AC).
4. INSTALLATION
To install the device, the following recommendations must be observed:
•Fix it upright, with the fan blowing up.
•There should be a free area below and above the device, with a distance of 15 cm from other devices or wall, to allow good air circulation.
•Protection and disconnection devices must be provided.
•As a safety measure for installations, the maximum load current must not exceed 80% of the rated current of the SSR module.
•At these nominal current values, well-secured terminals, suitable conductors and environments with adequate ventilation help in the
installation efficiency.
•The recommended cables are 16, 25 and 35 mm² for the 60, 80 and 100 A chains, respectively.
•To the connections, use compatible compression terminals.
•Power cords are connected directly to the SSRs, and, to avoid damage, do not over-strain the device.
•Proper grounding is essential to avoid electrical shock and interference.
Under rated current, the ambient temperature must not exceed 40 °C.

NOVUS AUTOMATION 3/5
5. ELECTRICAL CONNECTIONS
When installing the SSR module, Command Signal, Fan and Load connections are required.
•The control signal must be connected to terminals 1 and 2 of the side connector. A thermal protection relay is already inserted in this circuit.
It interrupts the control circuit when the temperature of the heatsink exceeds 80 °C.
•In the connection with the load, the power buses (or cables) are connected directly to the key buses of the switch. An ultrafast fuse must be
used to protect the installation.
•Fan is available on the side connector terminals 3, 4, 5, and 6. The installer must observe the supply voltage of the fan and connect it
according to the respective figures.
Fig. 02 – Fan connection at 127 Vac Fig. 03 – Fan connection at 220 Vac
Fig. 04– Electrical Connections - Command Signal and SSR Static Key Charge
6. HEAT DISSIPATION
With the current of load circulating, there is generation of intense heat on the switch. This heat should be quickly transferred (dissipated) into the
environment to prevent the switch overheating. The nominal load current (IL) values defined for each switch model take into account the use of a
suitably calculated heatsink.
The SSR static switch already incorporates the heatsink in the dimension suitable for the rated current specified and also the fan required.
As a safety measure for installations, the nominal load current shall not exceed 80% of the rated current of the switch.
Fig. 05– Ambient Temperature and Charging Current
7. OVERHEATING PROTECTION
The SSR static switch has a NF (normally closed) thermal relay that is in series with the control terminals. This thermal relay interrupts the
command signal by turning off the switch when the heatsink temperature exceeds 80 °C. This prevents damage to the electronic relays of the
switch.

NOVUS AUTOMATION 4/5
8. DIMENSION
Fig. 06– Heatsink dimensions
9. PROBLEMS SOLUTIONS
9.1 STATIC SWITCH DOES NOT TURN ON
The following possibilities must be observed:
•Inverted control signal;
•Control signal without sufficient voltage (minimum);
•Minimum load current not reached;
•Minimum load voltage not reached;
•Overheated device;
•Protection relay is defective, causing overheating.
9.2 STATIC SWITCH TURNS OFF IMPROPERLY
The following possibilities must be observed:
•Overheating caused by overload current;
•Overheating caused by a defective fan;
•Overheating caused by excessively hot environment;
•Overheating caused by poorly made load connections or badly tightened screws.
The user must identify the cause of the defect and arrange the correction, always with the key turned off.
10. TECHNICAL SPECIFICATIONS
Operation Conditions Unit Model
Static Switch 4860 Static Switch 4880 Static Switch 48100
Load Current (IL) A rms 60 80 100
Load Voltage V rms 40 to 480
Voltage Drop (Vssr) V rms 1.6 to 1.8
Leakage Current mA rms < 5.0
Frequency Hz 47 to 63
dv/dt V/µs 300
Control Voltage Vcc 3 to 32
Control Current mAcc 6 to 20

NOVUS AUTOMATION 5/5
Switch Time ms < 10
Shoot Zero cross
Isolation V rms 2000
Housing Temperature °C -40 to 80
Ambient Temperature °C -20 to 40
Protection Actuation
Temperature °C 80
Table 01 – Technical Specifications
11. WARRANTY
The warranty conditions are set forth on our website www.novusautomation.com/warranty.