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Electrical Protections

Ground connection

Toscano Protections – Protection against permanent and transient overvoltages with built-in differential – Single-phase/Three-phase – Type 2

Power board

Toscano protections are a safety device against permanent overvoltages caused by increases in network voltage in single-phase installations. They also protect against transient overvoltages caused by lightning strikes or network switching. Composed of IGA + Tripping Coil(s) + Differential. Additionally, the equipment incorporates a warning window that indicates the status of the equipment at all times.

The installation must be carried out by competent and qualified technical personnel, who are fully responsible for compliance with existing installation provisions and standards.

Before starting, disconnect the power and work with appropriate tools. Once installed, the live parts must be covered so that they are not accessible. If the equipment is used or modified outside the specifications of the manufacturer, safety may be compromised, exempting Toscano from all responsibility for improper use. The interior of the equipment should only be handled by our technical service personnel.

Wiring

Single-phase
MINI-PT-TDA

For the correct operation of the equipment, the phases must be connected to the ‘L’ terminals and the neutral to the ‘N’ terminal.

DO NOT INSTALL ON LINES WITHOUT NEUTRAL (N) AND WITHOUT GROUND (PE).

If one of the phases (L) is mistakenly connected in place of the neutral (N) and the equipment is powered, the warning window will flash rapidly in green indicating a connection error.

Diagram

Single-phase
MINI-PT-TDA

Operation

The equipment continuously measures the voltage in the installation and detects any increase above 10% of the nominal voltage. If such an anomaly is detected, it acts on the IGA (Automatic General Switch), disconnecting the voltage in the installation. The response time will depend on the level of overvoltage detected (according to the specifications of UNE-EN50550/63052 IEC-63052:2019).
The device will be operational again once it is manually reset, as long as the voltage is within its nominal values.

In the event of a transient overvoltage, the equipment absorbs it, diverting it to ground, thus preventing any damage to devices connected to the network. The warning window will be continuously illuminated in green.

If the protection becomes inoperative due to a transient overvoltage, the warning window will display red. In this case, the protective module will have been rendered useless and must be replaced with a new one.

When wiring the equipment, if one of the phases (L) is mistakenly connected in place of the neutral (N) and the equipment is powered, the warning window will flash rapidly in green indicating a connection error. If the equipment is properly connected and functioning correctly, the warning window will flash slowly in green.

Tripping Curve

Resetting due to thermal trip or ground fault

Learn the step-by-step process to reset the protections when a thermal trip or ground fault occurs.

How to reset the protections

Specifications

General

Nominal Voltage Un240 VAC
Frequency50-60 Hz
Maximum terminal section25mm2
Nominal sensitivity ln30 mA
Number of poles1P + N
Environmental ranges-20º +70º / 80% H.R.
ProtectionIP20
Mounting DIN Rail 35
DIN modules number3
Directives2014-35-UE (LVD)
2014-30-UE (EMC)
2014-65-UE (RoHS)

Permanent

Tripping voltage
Overvoltage response time		According to standard UNE-EN50550/63052
IEC-63052:2019

Transient

Maximum intensity lmax12,5 kA ; 8/20
Nominal intensity In6 kA
Protection level Up≤1,5kV
Type2

IGA

Nominal intensity40 A
CurveC
Breaking capacity10 kA

DIF

Nominal sensitivity In30 mA
TypeA